This is a really sad situation, since Clay Whitfield apparently suffers from mental health issues and feels like people are out to get him. His mother said she last saw him 2 weeks ago in Manchester, but hasn't seen or heard from him since.
Clay is about 5'8" and 170 pounds with brown eyes (usually covered by glasses) and long hair. He was last seen in a gray flannel shirt, blue jeans and brown boots. If you have any info, give Manchester PD a ring at 603-668-8711 and use the case number 18-3039 for reference.
Here's hoping we find Clay safe and sound!