Detective Franklin, 55, was a 13-year veteran of the city's police force, serving as the department's crime scene technician.
Before joining the Aberdeen Police, Detective Franklin served two years with the Maryland Transportation Authority Police. He was a member of Local Union #26 and worked as an electrician for 15 years.
"Mark was a true professional and will be greatly missed," the department said in a news release Friday announcing Detective Franklin's death.
He loved to ride his Harley Davidson motorcycle and was a committed family man who was known for his character and motivational skills when working with others, according to his obituary, which is published in Wednesday's edition of The Aegis.
Detective Franklin is survived by his wife of one year, Aileen Franklin, and four children, Charlie Franklin, Cody Franklin, Carson Franklin and Casey Green.
His funeral service was Tuesday, Sept. 25, at Mountain Christian Church in Joppa. Interment was at Mountain Christian Cemetery.
Detective Franklin's death was the second in less than two weeks for the Aberdeen Police Department. On Sept. 8, Officer Charles Armetta was killed in an off-duty fall in Baltimore.
Two other active Harford County lawmen also died this month, Sheriff's Deputy Cpl. Charles Licato in an on-duty automobile accident on Sept. 6 and Sheriff's Deputy Sgt. Ian Loughran on Sept. 13 from a heart attack suffered while on duty attending Cpl. Licato's funeral the previous afternoon.
In addition, former Harford Sheriff Theodore S. Moyer died following a long illness on Sept. 17.