So very sorry for your loss may he Rest In Peace I met Dave at our boat slip two years ago such a nice guy. I just found out about his passing again so very sorry he will be missed we shared side by side slips me being #30 and him being #31 always great chatting with him.God Bless✝️☘️

Whenever I was with or spoke to David, I left with a smile. He was such a down to earth, generous and heartwarming gent. Reflecting on our encounters, he was always smiling, laughing and I remember him as being so polite and respectful. David was as authentic and humble as they come. My first time hanging out with David we had a couple of Old Fashioned's - I will have one tonight and "cheers" to him. My love and dearest condolences to all of David's friends and family, what a truly brilliant person he was and he will be remembered as such.

We felt so fortunate to have known our son in law Dave. He was a wonderful husband and father to our daughter Susan Schoelle Duffy and his precious daughter Charlotte “Charlie Bear” as they called her and couldn’t have been a better brother in law and uncle. In the short time we really got to know him we grew to love him very much. Our hearts are broken for his entire family and the many friends he made in his life. We will miss him very much. Sue and Bruce Schoelle.

I am absolutely heartbroken to lose our David. David was consistently compassionate, kind and a conscientious student, always the first to lend a hand to another. He was quiet in class and a fun loving character in the hallway. My husband and I, as well as the middle school community send our deepest sympathy to David’s family, and sweet daughter.

Our deepest condolences for your loss. David sounds like a very amazing person, I am so sorry that we never met. I am sure that we would have gotten along great and share many laughs. You are all in our thoughts and prayers.

Steven and Debra
Elena's aunt and uncle

Dear Susan, Charlie and the Duffy family,

Like anyone that was fortunate enough to get to know Dave, I'm left heartbroken with the news. Words feel hollow but I hope you're taking some solace in how loved he was; quite simply Duff was an exemplary human being. For all of his accomplishments and successes, he was as humble a person you could find. My love and condolences to you Susan, Charlie and all of Dave's family.

Dear Nancy and Dave we are so very sorry for your loss. Please know you are all in our prayers.

Nancy and David,
I was heartbroken when my sister told me of David's passing. Please convey our heartfelt condolences to his wife and daughter. Our thoughts and prayers extend to you and David for the lost of your child.
“Death is nothing at all;
I have only slipped away to the next room.
I am I and you are you.
Whatever we were to each other, That, we still are"

Love,
Anthony Califano and Family

Dear Susan, Charlie, Nancy, Dave, Adrienne, Paul, the Schoelles and extended family, I hope you feel surrounded by much love today. I share in your sadness as you remember David. The first time I met David and Susan I felt an instant connection, they always made me feel so welcomed at there home and were so much fun to be around. I'm heartbroken for all of you. Wish I could have been there, sending love, hugs and prayers. Doris

Sending love and condolences to you and your family. The Duffy family will always have a special place in my heart!

In August 2011 Hurricane Irene came up the Coastline of New York City . During this time I was working for the NYPD where a Mandatory 2 day Post with possible Evacuations was looming. I happened to run into Dave while working just before the storm and without asking or any hesitation, Dave gave me his keys to his Downtown Apartment. This is the kind of person Dave truly was.

My Condolences to Susan and The Entire Family.

Priviledged to have met Dave only a couple times, I knew immediately he was a genuine great guy and wonderful person...
With heartfelt sorrow, sympathy,.thoughts and prayers to
Susan and Charlie, and Dave's parents...
Kalitsa Collis, Columbus OH

Our condolences to Susan, Charlie and the Duffy family. Dave was an incredibly kind, caring and generous soul. After randomly crossing paths with Dave years after I last saw him, he was quick to offer to help me in my career and even followed up to reiterate that his offer was sincere. He was truly a great man and he will be missed. So sorry for your loss.

Dave so sorry for your loss. Condolences to the entire Duffy family.

Dearest Dave and Nancy we are so very sorry for your loss. Please know you are all in our prayers.

I'm so sorry for your loss and was devastated to hear the news of Dave's passing. I'll always cherish the great memories with him at UNC.

Such a terrible loss to his entire family, especially his wife and daughter. All are in my prayers.

Words can’t even express how I am feeling right now . My heart is torn and I find myself confused why life has to be this way. Dave was such a humble, loving person. He always had a smile and amazing energy when we ran into each other. My family and I are here for you Susan if you need anything .
Love,
Kirk, Katrina and Noah

Sending all my love to Sue and the rest of Dave’s family. He will be missed.

Prayers and love, and our deepest sympathies. We are so sorry for your incredible loss.

Duff was the absolute man, when I didn’t have a car at UNC the guy made it a point to pick me up and take me where I needed to go. Guy also made me love Red Hot Chilli Peppers. RIP the dude #26.

I'm so sorry to hear this.. :-( may his memory be eternal!

Dave was one of the most genuine, funny, selfless, kind hearted, and generous people I’ve ever had the pleasure of calling a friend. We shared countless laughs and good times in Chapel Hill, NYC, and on the golf course. You will be so very missed my friend.

Susan and Charlie,

We were shocked and deeply saddened to learn of Dave's passing. We are so sorry. You are both in our thoughts and prayers.

Susan, we are so very sorry for the unimaginable loss of Dave. Our hearts break for you, Charlie, and all of his family & friends. Praying for comfort during this incredibly difficult time. May those comforting you right now bring you peace and love and you are able to see how much Dave was loved by so many.

Jenn, Tristen & Taylor Kurz , Fred & Madison Obermeier

Dear Susan and Charlie, I’m deeply saddened by your terrible loss, David was an incredible human being ... he will be missed. I don’t have any words to express how I feel. You are in my prayers!
love Carmen

Our deepest condolences to Susan, Charlie, the Duffy & Schoelle families. Dave was one of the most determined guys I've ever known. I remember Dave declaring he was going to grow up to be an investment banker probably around the time these pics were taken. He had a great, unique sense of humor, and was a talented athlete. We are so sorry for your loss, he will be missed.

My heart is filled with sadness for the Duffy family. May peace and love be with you.

With heartfelt condolences to the Schoelle and Duffy families on the loss of your beloved Dave. My heart and prayers are with you all!
With love, Mary Ann Karoussos

My heartfelt condolences to you Dave, and the entire Duffy family. You are all in my prayers.

My deepest condolences to the family. My thoughts and prayers are with you during these unimaginable times. Praying for your peace and comfort in the days ahead.

Susan and family, we are so sorry to hear of the unexpected death of David. He was a respected colleague and friend to our son-in-law Jonathan. Our prayers for comfort and peace are with you.
Sincerely. Stephanie and Rick Goodhart

My deepest condolences to the entire Duffy family for your loss. I am fortunate to have known Dave my entire life as a "big brother", friend, teammate, and opponent. What a wonderful guy. He will be greatly missed.

Susan, my husband and I are deeply sorry to hear this tragic news (our son, Jonathan informed us this morning). We are tremendously sorry for your loss. Our thoughts and prayers are with all of you. Charles and Sandra Bearman

My condolences to Nancy, Dave and all the Duffy clan. May your memories of David bring you strength, peace and comfort.

Susan and Charlie, we are incredibly saddened by your devastating loss and we will all be there by your sides in the days, months and years ahead. Our hearts go out to you, Sue & Bruce, Dave & Nancy and their families. We wish we could join you on Saturday but we will visit from RI at a later date when things quiet down a bit and safer gatherings return.

My thoughts and prayers are with you, Susan, Charlie, and family. I only had the pleasure of meeting Dave a few times, but it couldn’t be more clear what a kind and truly special person Dave was. He’s that guy that everyone likes and respects. I’m so very sorry for this unimaginable loss.

David, Nancy, Susan, Charlie - I cannot describe the how devastating this is for everyone at Select Equity & cannot imagine what you are going through. I want to express my deepest condolences to you all and the rest of the family. Dave was an amazing colleague and will be tremendously missed by all.

We are heartbroken. We love all of you and are praying for comfort at this incredibly painful time. We will continue to pray for all of you.

Words cannot fully express how sorry we are for the loss of David. Our thoughts and prayers are with you and all the family.

Susan, Charlie, the Duffy and Schoelle Families,

Our hearts are broken for you. Please let us know what we can do to help. You are in our thoughts and prayers.

With sympathy, Christine McBrien

David & Nancy and Family-

We are both heartfelt sorry to hear of your tremendous loss.
You have been and will be in our prayers. Dave I know from our
many conversations how proud we both are of our sons.
I know also of your great inner strength that will carry through
to your entire family.

Dear Nancy and Family, My deepest condolences on the passing of your son. My thoughts and prayers are with you all.

Sending my deepest condolences to the Duffy Family on the passing of David. Words cannot fully express how sorry I am for your loss. I am keeping you in my thoughts and prayers.

I messaged Dave a month or so ago asking for advice on a matter. Instead of texting back, I received a call less than 15 mins later with thoughtful, creative and smart recommendations over a 30 minute conversation/ catch up about life. This is who David was to me. Someone who was always overly generous with his time and willing to help others. Leonie and I grieve deeply with Susan, Charlie, Nancy, Dave Sr., Adrienne, Paul and the Duffy family. We live in hope that our children will be like Dave and enjoy life to the fullest while making others feel special along the way.

In just a few years, Dave and Susan became close friends to me and my family in Bellport. I feel honored to have been in Dave’s orbit — he was truly the best of the best. So kind, gracious, charismatic... I loved his sense of humor, his smile and expressions. He spoke with confidence and ease and always made everyone around him feel important and special. It’s hard to meet quality friends later in life and I feel so very lucky to have had a friend like Dave. Sending love and strength to all of Dave’s family and loved ones.

Our sincere condolences to Susan, Charlie, Nancy, David, Adrienne, Paul & families. There are no words to express our heartfelt sadness & grief of the passing of David Mark. He was a giant & left this world too soon. He will forever be in our hearts.
Love, Ellen & Ron, Marisa & Ronnie, Amy & Harry, & Jack ❤️💕🙏

Our deepest sympathy to Nancy, Dave, Sue and families. May your memories sustain you at this time.

Susan, Charlie, Duffy, Schoelle Families,
Words seem too small to express the sadness we feel about David’s death. He will be so missed. Wishing you all love to bring comfort, the courage to face the days ahead, and happy memories to forever hold in your hearts.
With Love, Gina Tucci Botti & Family

Susan, we are so deeply sorry to hear this tragic news and our hearts go out to you and your sweet little girl Charlie. Adrienne, Paul, and Mr. & Mrs. Duffy, we are tremendously sorry for your loss. Our thoughts and prayers are with all of you.
- Lauren (Seery) Ryder & Tom Ryder

My deepest condolences to the Duffy family. My thoughts and prayers are with you.

Our deepest condolences on David’s passing. We are saddened by your loss. Please know that David and his entire family are in our thoughts and prayers. May you all have the strength to get through this difficult time.

Nancy and Family,
I am so sorry to hear about your loss. You have been in my thoughts and prayers. David sounds like he lived a full life in a short time.

Dave was one of the most thoughtful, caring and genuine people I have ever met. He was an incredible father and a great friend. If I ever needed advice or help, Dave was always there. My thoughts and prayers are with the entire Duffy family. I will miss talking to him every day.

Sue, Charlie, Duffy, Schoelle Families,

My deepest condolences on this immense tragedy. I remember seeing you in Battery Park, hearing about your move back to NY and your love for Bellport and so happy to reconnect and see childhood friends in their next stage of life. This tragedy is unspeakable. Sue- you have always been an incredibly upbeat, vivacious woman. I pray for you to draw on that incredible strength in this horrific time. Love Gillian Groarke Burns

From playing basketball and manhunt around the neighborhood as kids to lacrosse together in high school, and beyond, Dave was always a great friend and teammate. My heart breaks for the whole Duffy family. He will be missed. Our deepest condolences.

I am so sorry to hear of Dave’s passing. I did not know him, but recognize him from around town. My heart also grieves and my prayers are with his wife and his daughter and all of his family and friends . I understand he loved Bellport and the bay and we are honored to be the recipient of donations in his name. Oysters in David’s name will be planted in our protected oyster sanctuary in Bellport Bay

Our thoughts and prayers are with the Duffy family.

Had the distinct pleasure of working with Dave as a park attendant, and as an intern at HSBC, a true mentor and friend; a great guy who looked out for you and make sure you had everything you needed. May everyone aspire to be as good a person as Dave was you will be greatly missed sir.

“The world was bankrupted of ten million fine actions the night he passed on.” - From waiting for the ringing bell for Santa to one o clock the ghost is coming in your backyard and twisted metal 2 in your basement to birthdays and Christmases and nights in the city and grandma Ruth trips - I’m so lucky to have gotten to grow up with you and watch you grow into an amazing man, husband and father. Love you cousin. Miss you always.

“A cousin is a little bit of childhood that can never be lost.” Marion C. Garretty

I miss you so much.