PITTSBURGH -- Authorities said a local child sex suspect should have been taken off the streets years ago. This is the second time 37-year-old Michael Karrer, of Allison Park, has been arrested in connection with child pornography.

The first time, police said he told them that he met his victims on an educational Web site where children around the world log on to chat with other children. On Tuesday night, he was arrested again, and once again, according to police, he confessed his attraction to children.

According to the criminal complaint, Karrer is accused of sexually assaulting a 4-year-old girl and taking pictures of the alleged indecent assault on Christmas Day.

When cyber crime investigators from Greensburg state police served a search warrant on Karrer's home, they said they found the disturbing images on his cell phone. During questioning, officials said Karrer gave full details of the assault.

Parents in the parking lot of a local pet store where Karrer worked until his arrest were disgusted by the allegations, even more so when they learned that this wasn't Karrer's first arrest on child pornography charges.

In 2003, Karrer was arrested and was about to go to trial on charges of possessing child pornography. He allegedly mailed his underwear to a 13-year-old girl and tried to meet her for sex.

The state and Karrer worked out a plea agreement and all charges were dismissed, except for one corruption of the morals of a minor charge. Karrer was ordered to serve two years probation.

Karrer is not married and does not have any children. Up until his arrest he lived with his parents. Karrer remains in the Allegheny County Jail.

State police told Channel 11 that they plan on taking this case to federal investigators.