A 41-year-old convicted sex offender who fled to Guatemala in the summer after being arrested in Arlington County for allegedly molesting a 17-year-old boy has been indicted by a Prince William grand jury on similar charges.

Now, Thomas R. Koucky faces more charges and a January trial in Prince William County, where he was indicted in September on charges of sexually abusing two youths when he took them to Potomac Mills mall or home to Occoquan.

Koucky, of Arlington, has been indicted on one charge of aggravated sexual battery for allegedly abusing a Maryland boy in 2001. He also has been indicted on nine other charges of indecent liberties and carnal knowledge for allegedly abusing a Virginia boy in 2000 and 2001.

Prince William County police Detective Elba Roldan said the charges stem from a relationship Koucky forged with the boys about five years ago. In November 1999, Koucky worked in real estate and met the Maryland boy while showing the boy's parents a home in Maryland. Later, the boy invited his friend from Virginia over for dinner and Koucky and the boys began hanging out together, Roldan said.

"He would invite the kids into a model home where there was big-screen television," Roldan said. "Then he would take them to a skate park with the parents' permission and do something to them on the trip. He also volunteered to pick them up from school."

Many times, she said, the boys would be together and were given alcohol and drugs when the abuse occurred. Often, the Virginia boy was abused when he was taken to his mother's home in Occoquan, Roldan said.

"The parents said Koucky's the typical neighbor next door. Your car gets a flat tire, and he'll volunteer to help fix it," Roldan said. "The parents say, 'I can't believe I trusted this guy.' "

The boys in the Prince William case are now 18 and 17, she said.

Koucky had been registered as a sex offender in Virginia, but because he was not deemed violent, his name appeared on a list available only to groups such as day-care centers, schools and nursing homes. It was not on the public sex offender registry.

By his own account, Koucky has abused 300 boys. He was convicted in Florida in 1990 of soliciting a 13-year-old boy for prostitution and was placed on 10 years' probation. He was arrested in 1993 on charges of soliciting a 16-year-old in Frederick, Md. He was charged in Arlington with molesting a 17-year-old boy and was released on $3,000 bond on June 17.

Koucky didn't show for an Arlington court hearing June 29 in which prosecutors were going to attempt to revoke the bond.

Three days later, he was apprehended without incident outside Guatemala City and taken back to Arlington. He remains at the Arlington County jail without bond, Arlington County Commonwealth's Attorney Richard E. Trodden said.

Last week, Koucky was in Arlington County Juvenile and Domestic Relations Court, where he waived his right to a preliminary hearing on one count of indecent liberties. His case there now goes to a grand jury, which will decide Monday whether to indict him.

If he is indicted in Arlington, Koucky could face more serious criminal charges.

"The grand jury may see other evidence and find a more appropriate charge," Trodden said.

Koucky's attorney, George Wooditch, did not return messages left at his office Friday.

Thomas R. Koucky had been registered as a sex offender in Virginia but wasn't deemed violent.