The trail has gone cold in the investigation of a roadside beating reported late last year by a Kansas University professor.

Douglas County Sheriff’s Office spokeswoman Lt. Kari Wempe said Thursday that detectives had finished their paperwork related to religious studies professor Paul Mirecki’s report that he was beaten by two unknown men on Dec. 5, 2005, on a roadside south of Lawrence.

The office has not identified any suspects and, unless any new leads come in, the investigation is finished.

At the time, Mirecki was under fire for comments he had posted online critical of organized religion.