police interview add number of neighbors including katrina ben. she said she had a romantic relationship with samoa but was not involved in the murder. she told police she didn't even own a gun. >> then came the big break, a guy driving his car along the b welt way sees a paragrap paragraphs -- beltway sees a partially dismantled gun and turns around and gives to it the cops and turns outhat's the gun that killed eric. where did the gun come from? the detective figured that out. >> reporter: detective rubin traced the gun through its five previous owners to this pawn shop in columbia, mississippi, where he learned it was purchased eight years ago by katrina ben. she was arrested and today convicted of first-degree murder. >> she thought she got away with it. thought she got rid of the gun but the good samaritan finds the gun and we have great detective work by detective ruben and the mystery is solved. >> reporter: katrina ben now faces aossible sentence of life without parole. live in rockville, pat collins, news4. >> thanks. >>> people call it t

police interviewed a number of neighbors including katrina ben.she was involved in a romantic relationship with samoa, but denied any involvement with the murder. she said she didn't even own a gun. shortly after the murder, a good samaritan driving along the beltway near colesville road, cease this partially dismantled gun and gives it to the cops. turns out this was the gun that killed eric samoa. the detective on the case traces the gun to its five previous owners to this pawn shop in columbia, mississippi, where he learns it was purchased eight years ago by katrina ben. case closed. >> i think there's no case without that gun. the gun links directly to her. if we don't get that gun without that good samaritan, there is no conviction in this case. >> reporter: katrina ben convicted today av first-degree murder. she faces a possible sentence of life without parole. live in rockville, pat collins, news4. >>> we're taking a look at storm team 4 radar right now. one thing you'll notice, most of the rain to the west includes the d.c. metro area and

a jury found katrina ben accused of shooting samoa in 2012.he two were having a romantic relationship and she found out samoa was seeing other women. prosecutors were able to trace the murder weapon back to her. >>> a mother could face charges in a deadly shooting involving her teenage son. 13-year-old caldwell was accidentally shot by his 14-year-old best friend last month inside an apartment on downing street northeast. according to court documents, the 14-year-old told police he was showing caldwell his mother's gun when the magazine fell out. he didn't noe bullet was still in the gun when he pulled the trigger. >>> shot by a b.b. gun by one of her student passengers. a 10-year-old boy brought the the b.b. gun to school in the morning and was playing with it on the bus on his way home that afternoon. he and a friend pulled the trigger several times, hitting a student in the foot and the bus driver. neither was seriously hurt. parents were upset the gun went unnoticed the entire day. >> of course at first i was a little freaked out. this is