A medical expert says a man claiming he was sodomized by police with a baton did not have severe enough injuries to support his account.

Dr. Frank Sconzo testified Tuesday at the Brooklyn trial of three NYPD officers. Michael Mineo says he was abused while handcuffed in October 2008.

Sconzo did not treat Mineo. He was called as a defense witness and said it’s possible Mineo had some pre-existing medical condition. He said an abcess that formed after the incident did not contain bacteria that would suggest the injuries came from the alleged abuse.

Richard Kern is charged with aggravated sexual abuse and assault. Two other officers are charged with hindering prosecution and official misconduct. All deny wrongdoing.