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 NEWS CENTER Video Forecast Woman Identified in Cherryfield Murder NH girl dies of cancer Sitting room only at kitten yoga Bear visits home in Hiram, can't reach feeders Mexico resort drowning death a mystery for Wisconsin family Rick Valeri talks about how he believes he and his wife were drugged on vacation in Mexico NOW: clammers priced out Mom beats stage 4 cancer Lawmakers back bill to raise age to buy tobacco to 21 More Stories Kennebunk man sentenced for sexually abusing… Jul 21, 2017, 2:18 p.m. State police identify woman found dead along Rte.… Jul 21, 2017, 3:37 p.m. Cancer patient's legacy will be helping others… Jul 21, 2017, 9:04 p.m.