Tacoma, Wash. ? A Thai immigrant convicted of incest led investigators to the body of a 12-year-old girl who had been missing since the Fourth of July, and is expected to be charged in her death, authorities said Friday.

Police are also trying to determine if Terapon Adhahn, 42, is connected to other missing child cases that date back to 1986.

Zina Linnik, abducted during a neighborhood fireworks display, died from “homicidal violence,” said Tacoma police spokesman Mark Fulghum and the Pierce County medical examiner’s office. Her body was found in a rural wooded area after information from Adhahn’s attorney led police and FBI agents there, authorities said.

Adhahn is expected to be charged with the girl’s abduction and death, Police Chief Don Ramsdell said. He has been cooperating with detectives but has yet to provide a complete statement, Ramsdell said. Court documents said he initially denied involvement.

Zina disappeared July 4 after being sent down an alley behind her home to bring back some of her siblings, who had wandered off to watch fireworks. Her father heard her scream, found a single flip flop on the ground and saw a boxy gray van driving away. His partial recollection of the license plate number led investigators to Adhahn.

Adhahn apparently made his living as a handyman, police said. He served two months in jail and completed five years of sex offender treatment following a 1990 incest conviction after he violently raped a female relative, according to court records.