A black woman who killed her white co-worker in a yoga clothing shop has been convicted of first-degree murder and now faces the prospect of spending the rest of her life behind bars

Brittany Norwood, 29, used at least half a dozen weapons from inside the store to kill Jayna Murray, 30, in a prolonged and brutal attack. These included a hammer, wrench, knife and peg used to hold up a mannequin. Norwood was found guilty after a jury in Montgomery County, Maryland, took an hour to reach a verdict. Norwood attacked Murray inside the Lululemon Athletica shop in Bethesda, Maryland - a Washington, DC suburb - and then staged a robbery. She used numerous weapons to kill her, then lied and told police that they had been attacked by masked men. Her defense lawyer conceded that Norwood killed Murray, but said it happened during a fight and wasn't premeditated. The legal argument was aimed at sparing Norwood a first-degree murder conviction, which can carry a sentence of life in prison without parole. State's Attorney John McCarthy told jurors during closing arguments that there was abundant evidence of premeditation. He said that Norwood lured Murray back to the shop after closing by saying that she had forgotten her wallet and needed to get back inside. A medical examiner testified that she found at least 331 wounds on Murray's body and that the woman was alive for the duration of the attack.