Chicago - A Roseland neighborhood registered child sex offender was charged with having inappropriate contact with an 8-year-old boy inside a washroom in a McDonalds restaurant outside Wrigley Field Tuesday evening on the North Side.

Cortez Lewis, 29, was identified as a man who allegedly had inappropriate contact with an 8-year-old against the child's will inside a McDonalds bathroom Tuesday about 6 p.m. in the 3600 block of North Clark Street, according to police News Affairs Officer Ronald Gaines.

A police report said that Lewis, of the 11300 block of South Wentworth Avenue, allegedly took the boy into a stall, closed the door and pulled his and the childs pants down. The boy ran away and began yelling saying Lewis had tried to rape him.

Lewis was charged with felony unlawful restraint and felony failure to register [as a sex offender] within 10 days, according to Gaines. Lewis was also charged with two misdemeanors -- disorderly conduct and battery, according to Gaines.

He is scheduled to appear in court later Thursday.

Lewis is listed on the Illinois Sex Offender website as a child sex offender who was convicted of unlawful restraint of a child who was 10 when he was 28.

Belmont Area detectives are investigating.