In 1989, Slater was arrested for drunk driving. He was sentenced to ten days in jail. In 1994, he was arrested when he tried to board a commercial plane with a gun in his luggage. He was sentenced to community service. In 1997, Slater was convicted of punching his girlfriend, Michelle Jonas, and assaulting a police officer while under the influence of heroin, cocaine, and alcohol. He had consumed them for two days straight and had little or no sleep. He was treated for more than 100 days in a rehabilitation facility while on bail, and then was sentenced to a three-month term in jail, followed by three months in a residential rehab center. He was released from prison after 59 days on the basis of good behavior. On May 24, 2005, Slater was arrested in Manhattan, New York, after he allegedly groped a woman on the street. Slater was charged with third-degree sexual abuse and was held at the 19th precinct in Manhattan. The charges were later dropped from lack of evidence and on the condition that Slater keep out of trouble for six months.