Close Accused Walmart stabber enters not guilty plea Defendant from Falmouth Walmart stabbing pleads. Kelsey Fabian, WCSH 10:04 PM. EDT October 13, 2016 CONNECT TWEET LINKEDIN GOOGLE+ PINTEREST PORTLAND, Maine (NEWS CENTER) -- A homeless man accused of stabbing and killing a man in a Walmart parking lot has plead not guilty to his murder charge. Kenneth Briggs was charged with the murder of Roger Nelsen. Nelsen was found laying in a pool of blood in Falmouth Walmart parking lot back in August. Briggs was not required to enter a plea during his initial court appearance and was ordered to have a mental evaluation. The evaluation has been completed and the results have been pending. Briggs' attorney Molly Butler Bailey stated that she is not confident that Briggs is competent enough to understand the charge. He is being held without bail. Copyright 2016 WCSH CONNECT TWEET LINKEDIN GOOGLE+ PINTEREST JOIN THE CONVERSATION To find out more about Facebook commenting please read the Conversation Guidelines and FAQs Leave a Comment TRENDING VIDEOS NOW: New tick disease Stealthing epidemic Goldberg Youth Sports commentary 43 year old gymnastics teacher accused of sexually abusing a minor. Woman convicted in childcare death released Gorham crash - March 24 NEWS CENTER Video Forecast Ice Carousel (Ctsy: Snowmobile Northern Maine) Maine girl says 'I am not a distraction' Goose lays eggs at Whole Foods More Stories Britain raises terror level after concert attack May 23, 2017, 7:17 a.m. From the vault: Leno talks to NEWS CENTER before… May 23, 2017, 5:16 p.m. Maine Supreme Court finds ranked-choice voting law… May 23, 2017, 11:25 a.m.