By Rusty Surette, NEWS 9

OKLAHOMA CITY -- An arrest affidavit revealed a Marlow man arrested for sexually assaulting a four year old had previous dealings with the Department of Human Services.

The Stephens County Sheriff's Office said Brian Grant Williams, 63, confessed last week to assaulting the child at least four times.

"He said, 'I know you're coming after me,' and he said, 'I want to confess to doing all this because I  know you're going to get me,'" said Stephens County Sheriff Wayne McKinney.

Williams told detectives one of the assaults took place at a car dealership near Duncan where he works as a security guard.

According to an arrest affidavit, Williams was first questioned by DHS earlier this year following a complaint of physical abuse. The report does not say who was abused, but it does state at the time of the complaint, Williams was living in his Marlow home with his girlfriend and her two children.

The affidavit stated, during the investigation Williams had disclosed inappropriate thoughts about a 13 year old relative. The report went on to state DHS did not take any action, other than telling Williams' girlfriend not to leave her children alone with the 63 year old.

McKinney said now that the case is in his hands, he's going for the maximum punishment possible.

"One thing is we're going to take a very aggressive approach to it. It's just sad we don't have the death penalty to deal with these kind of situations," McKinney said.

Williams is charged with aggravated sexual assault and was booked into the Stephens County jail on a $200,000 bond. His next apperance in court is scheduled for August.

DHS said it could not comment on specific cases.