Chris Vaughn Stripper 'Accessible' Wednesday

A Chicago stripper prosecutors want to testify at the Christopher Vaughn murder case will be "accessible" Wednesday to take a subpoena, a prosecutor said.

Stripper Chrystal Miller has been less than accessible in the past when attempts were made to serve her at her apartment and during a meeting, and Will County Judge Daniel Rozak's patience seemed to be running out during a hearing Wednesday morning.

Judge Rozak asked Assistant State's Attorney Michael Fitzgerald if Miller knew what was in store for her if she failed to take her subpoena Wednesday.

"That's why she agreed to make herself accessible," Fitzgerald said.

Whether Miller gets served or not, Vaughn will be back in for a June 18 hearing.

Vaughn, 37, is slated to go to trial Aug. 13 on charges he murdered his wife and three children.

Vaughn, his wife Kimberly, 34, and children Blake, 8, Cassandra, 11, and Abigayle, 12 were heading from their Oswego home to a Springfield waterpark in June 2007 when he pulled off Interstate 55 and stopped on the frontage road outside Channahon.

Christopher Vaughn then murdered his wife and children as they sat in the family's minivan, according to police and prosecutors.

Vaughn told detectives it was actually his wife who shot down their children, put a bullet in his leg as he fled for his life, then turned the gun on herself and committed suicide.

Christopher Vaughn reportedly explained to detectives that he had confessed to his wife about an extramarital dalliance, and that was what led to the unhinged Kimberly Vaughn's killing spree. Medication for migraine headaches also contributed to her becoming both homicidal and suicidal, officials said Christopher Vaughn told detectives.

The stripper witness prosecutors want to testify supposedly spoke with Vaughn when he paid a visit to her club just days before the killings.