Terry Horman still lingers over a picture that features the view from her son’s apartment window in Frederick. She said she wonders whether the picture will reveal something about the death of her son, Joshua Wayne Crawford, who painted the picture during the holidays a year before he was killed. Crawford, the second of Horman’s three sons, was found dead in his apartment on his 21st birthday: July 2, 2003.

Frederick County Sheriff’s Cpl. Jason West said Crawford died from suffocation and “blunt force injuries.” A few items were thought to be missing, including a guitar. The sheriff’s office has received a “multitude of tips” since 2003 — and investigators are still pursuing a lead from last month — but most have led investigators nowhere.