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 Firefighters battle massive blaze in Sanford NEWS CENTER Video Forecast Sanford mill fire Illegal Dog Breeding Operation Sanford Fire Chief Stephen Cutter provides update on massive fire at abandoned mill building RAW: Zola the gorilla dances at Dallas Zoo Man brutally attacked teenager in Rochester, New Hampshire Big Jobs Coming To Maine OPIOID EMERGENCY LAW MagnifyMoney: Should all Americans be guaranteed a basic income? More Stories Police investigating death of 2½ week-old baby in Warren Jun 24, 2017, 8:03 p.m. Crews battle massive blaze at abandoned mill… Jun 23, 2017, 7:41 p.m. Horses rescued from unsafe conditions at NH farm… Jun 24, 2017, 4:25 p.m.