A Maine man who showed up uninvited at two Oakland elementary schools has been charged with criminal trespassing. Police say 47-year-old Ronald Morin of Oakland was asked by school administrators to leave Atwood Primary School early Tuesday morning, then turned up at Williams Elementary School a short time later. He does not have children at either school. Police say he was also charged with littering when he crumpled up the written trespass warning he had been given and threw it on the ground. School Superintendent Gary Smith tells the Kennebec Journal, the district is much more wary of trespassers since the shooting at a Connecticut elementary school in December. Morin could not be reached.