A 34-year-old man has been charged with murder in the shooting deaths of his mother and stepbrother, who were slain in their Fort Washington home this month, authorities said Tuesday.
Quindell G. Mercer, 34, was arrested Monday evening at a District Heights home in connection with the Aug. 4 slayings of his mother, Patricia Mercer-Harris, 56, and her son, Frank L. Harris, 20.
Tips from the community helped develop Mercer as a suspect and led police to the home where he was found, said Julie Parker, a Prince George’s County police spokeswoman.
When officers arrived Monday night, Mercer was seen tossing a book bag outside a window, Parker said. Police found the bag, which contained four handguns, authorities said.
Ballistics tests showed that one of the weapons — a Desert Eagle .45-caliber handgun — was used to kill Mercer-Harris and her son, according to police.