Lendell R. Sinclair, 53, was found dead at the bottom of a 14-step carpeted staircase inside the Atchison County residence where he had lived with his sister and brother-in-law. Deputies responded for a welfare check on May 13, 2010, after Sinclair had not been heard from for about a week and had most recently sought treatment in an emergency room for hip pain. An initial obituary reported the death as resulting from a fall, but the Sedgwick County Sheriff’s Office lists the case among cold cases and treats the circumstances as unsolved.

No arrests or publicly identified suspects have been announced and the investigation remains open. Sinclair was a Spirit employee and a Marine veteran; he was survived by three children, his mother, two brothers, and two sisters, and a memorial service was held May 19, 2010, with burial honors. If anyone has information about Sinclair’s whereabouts or the circumstances before May 13, 2010, please share what is known.