Stacy Peterson dominating Kathleen Savio hearing

The disappearance of Drew Peterson's fourth wife is dominating a hearing concerning the death of his third wife.

The hearing continues Tuesday in Will County Circuit Court to determine whether "hearsay" evidence will be allowed during Peterson's trial for the 2004 death of his third wife, Kathleen Savio. Peterson is charged with first degree murder and has pleaded not guilty.

On Monday, neighbor Sharon Bychowski sobbed as she testified that Peterson's fourth wife, Stacy, told her she was convinced Peterson would kill her. Stacey Peterson disappeared in 2007.

Prosecutors aren't saying why they're focusing on that case. Peterson has been named a suspect but hasn't been charged in her disappearance.

The hearing is expected to last at least another week.