Sister of 9-year-old raped, strangled in 1970 prepares to face sex offender suspected in death

Milwaukee prosecutors are trying to use the state's sex offender law to help keep a 73-year-old man suspected of a 1970 child murder in custody.

Robert Hill recently finished a 10-year sentence for sexually assaulting four children under the age of 10 between 1995 and 2002.

But police say Hill also confessed to the 1970 killing of 9-year-old Donna Willing, before recanting. They say he knew details of her injuries that hadn't been released.

Since physical evidence in her case was destroyed or lost in the 1990s, prosecutors will now try to prove he is a sexually violent person who should be kept in custody indefinitely.

A hearing Monday will determine if the case goes to trial.

Hill is being held in a supervised facility, pending the hearing's outcome.