(WGN-AM)- A registered sex offender was arrested early Thursday morning after a neighbor woke up and found him in her bed, according to the Will County Sheriff's Office.

Larry Simpson, of 129 Reverend Walton Drive in unincorporated Lockport, was charged with home invasion and aggravated criminal sexual abuse, said spokesman Pat Barry. Simpson, 51, was a registered sex offender, Barry said.

According to Barry, the victim, a 33-year-old female, woke up at about 1:30 a.m. and found the suspect with an object at her neck and his hands on her. The woman screamed, and the suspect fled, Barry said.

The victim's mother heard the screams and chased the suspect out of the house, following him as he ran to Reverend Walton Drive, Barry said.

Both the mother and victim recognized the suspect as their neighbor, he said. Simpson was arrested about 2 a.m.

At age 25, Simpson was convicted of deviate sexual assault in Will County, according to records. His victim was 23.

(The Chicago Tribune contributed to this story)

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