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: Mainer wins Nobel Prize Disappearance baffles family NOW: Trans teen says private school asked him to leave Inside the chaos: Police release Las Vegas body cam footage Jason Aldean on stage when deadly Las Vegas shooting began NEWS CENTER Video Forecast Gun Sales after Las Vegas- NECN NOW: Vegas couple says they recognize gunman from gun show Botanical Garden battle NEWS CENTER Video Forecast More Stories Attempted child abduction at Portland Hannaford,… Oct 20, 2017, 2:11 p.m. Second fire torches Sanford home, half-mile from… Oct 20, 2017, 4:04 p.m. Juvenile bald eagle shot, killed with shotgun in… Oct 20, 2017, 6:42 p.m.