Mark Gill Walsh, a 51-year-old Boston Police Detective who served on Dorchester's Area C-11 district earlier in his career, died on Feb. 20 after a series of emergency medical issues. A wake and funeral for the Milton native and father of two young children will be held this week— Wednesday and Thursday— at Dorchester's St. Gregory's Church in Lower Mills. A large turnout is expected.

Below is Det. Walsh's full obituary, shared with the Reporter by the Alfred D. Thomas Funeral Home in Milton, which is handling arrangements.

•••

Mark Gill Walsh, age 51, of Milton, passed away after a rapid courageous battle with the flu, sepsis and subsequent cardiac trauma on February 20, 2025, at Beth Israel Deaconess Hospital in Boston, MA. Born on September 11, 1973, at St Margaret’s Hospital in Dorchester, MA, Mark’s zest for life and unwavering spirit touched the hearts of all who knew him.

Mark was the beloved husband of Christine L. Walsh (LaCouture), a devoted father to John Daniel and Conor William Walsh, and a loving son to Ann M. Walsh of Milton and North Falmouth and his late father Daniel D. Walsh. His familial warmth extended to his siblings, Maura W. Sargent and her husband Forbes of Milton, Siobhan W. Sullivan and her husband Edward of Dorchester Lower Mills, Daniel P. Walsh of Milton, and Briege W. O'Connell and her husband Jake of Milton. His role as a doting Uncle to Kitty (her husband Hisham) and Charlie Sargent, Caroline and Mary Kate O’Connell, and Clare and Eddie Sullivan brought him immense joy, and spirited political debates and hosting sports viewing parties. Mark's life was further enriched by his big lovable fur baby Oliver, who was a constant source of friendship and comfort after a long day of police work.

Mark's academic and athletic prowess shone brightly during his years at the Glover, Pierce and Milton High School, where he was a standout athlete on both the basketball and baseball teams. As a youth, Mark made a name for himself as a clutch home run hitter on his Babe Ruth baseball team setting the stage for his lifelong love of sports. He continued his education at Curry College, where he earned his Bachelor's Degree in Criminal Justice.

Prior to his death, Mark was a Detective in the Boston Police assigned to A-1 Detectives. Mark joined the Boston Police department in October 2005. His prior assignments as a Police Officer included District D-4, the Youth Violence Strike Force and District C-11. He was repeatedly cited and admired for his dedication and commitment to public safety in the City of Boston which included being a First Responder to the 2013 Boston Marathon bombing stationed across from the finish line on Boylston Street.

His earlier years were marked by his role as a Boston Municipal Police Officer and his work as a Page at the State House in Boston where he formed lifelong friendships. Mark's commitment to his profession and the well-being of his city was evident in the passion and integrity with which he approached his duties.

Mark's interests were as varied as they were engaging. A long-term Patriots fan, Mark was a season ticket holder and traveled to several Super Bowls to cheer on his team. An avid golfer, he relished the challenge and camaraderie found on the links with his fellow officers and Milton crew. Cooking was another passion, and he was known for his prowess with the barbecue grill and smoker, delighting family and friends with his culinary creations. Summers were often spent lounging by his pool, where he enjoyed the simple pleasure of relaxation in the company of his loved ones, especially Johnny and Conor reinforcing their swimming lessons in their pool as well as at both Nantasket Beach and Old Silver in North Falmouth.

Above all, Mark treasured the time spent with the love of his life, Chrissy and his boys, whether it was supporting them in their sports endeavors, cheering Chrissy on during her Boston Marathon runs or simply enjoying their company. His pride in his Irish heritage was a cornerstone of his identity, and he cherished the opportunity to travel to Donegal, Dublin, Argentina, Chicago, Savannah and several other destinations to “investigate” how their St. Patrick's Day celebrations compared to South Boston.

Amongst his large and growing family Mark was a strong presence behind the scenes, known as a gentle giant who effortlessly slid zingers into family functions arousing strong as did spirited debates among his loving Walsh, McLaughlin, Ford, Hegarty and Gill cousins. Mark loved holidays and being surrounded by his friends and family.

Although Mark has left us too soon, we will all cherish our time with him and thank his many friends, the amazing unwavering Boston Police community and his team at Beth Israel Deaconess in Milton and Boston for their loving care in his final days.

Mark's life was one of service, love, and laughter. His support for his family, his dedication to his community, and his ability to bring joy to every occasion will be deeply missed by all who were fortunate enough to cross his path.

As we bid farewell to Mark G. Walsh, we celebrate a life lived to the fullest, a legacy of love, and a memory that will forever remain in our hearts. His spirit will continue to inspire those who knew him, and his contributions to his family, friends, and community will be remembered with admiration and gratitude. Mark's journey through life was a testament to the power of kindness, the strength of family bonds, and the enduring impact of a life well-lived.

Please Note: Visiting hours will be held at St. Gregory Church, Dorchester Wednesday February 26th from 3:00 to 7:00 pm. Funeral Mass at St. Gregory Church, Dorchester Thursday February 27th at 10:00 am. Burial will follow at Milton Cemetery.

In lieu of flowers, donations may be made in Mark’s memory to support John & Conor’s College Education.

Link for the gofundme:https://www.gofundme.com/f/help-mark-and-family-through-crisis