COTTONWOOD HEIGHTS — A man arrested last week for investigation of sexually assaulting a 13-year-old girl he met on MySpace also threatened to harm the girl and kill her friends, according to court documents.

New details about the case came out Thursday when William Dongwoo Suh, 25, was charged in 3rd District Court with four counts of aggravated sex abuse of a child, one count of sodomy on a child and two counts of making terrorist threats.

Suh, who was previously convicted in California for having sex with a minor, met the Utah girl through MySpace. He traveled to Utah in June with the intent of having sex with the girl, according to police.

When Suh arrived, the girl told him she was just 13, according to court documents. Over the next few weeks, the two engaged in various sexual acts, according to police and court documents.

But when the girl tried to back off from the relationship, Suh sent her text messages threatening to find her friends and "slit their throats," and later sent her a text ordering her to perform a sex act "if you want your dad out of jail," and also texting, "… or I'll hurt you," according to court documents.

While being interviewed by police, Suh told investigators that he had looked up the law on the age of consent in Las Vegas and believed the juvenile could consent to sexual activity, court documents stated.

About five years ago, Suh was convicted in California on a similar offense and spent six months in jail, Cottonwood Heights police detective Beau Babka said. In that case, Suh had also threatened a family member of the victim and had a shotgun. He was waiting for that person when police arrived first and arrested him, he said.

When Suh arrived in Utah he had his laptop computer with him. Babka said investigators were going through the computer to see if Suh had chatted with any other young girls and if there were any other potential victims.

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