A Quapaw man serving a 25-years sentence in Lawton was found hanging in his cell Friday night.

Billy Joe Roberts, 31, was pronounced dead around 10 p.m., Feb. 13, after he was found hanging by a rope attached to a bunk.

Lawton police say the death is still under investigation, but they suspect suicide.

Roberts was convicted in November of 2008 of sexual battery, attempting to elude police and car theft. He was transferred from Ottawa County to Lawton on Jan. 9.