ARCADIA >> Police arrested a convicted sex offender Friday after he was found nude, sitting atop a vibrator and surrounded by pornography on the grounds of an Arcadia church, officials said.

Paul Allan McQuown, 55, of Azusa is accused of indecent exposure following Friday’s arrest, which took place shortly after 4 p.m. at the Arcadia Congregational Church, 2607 S. Santa Anita Ave., according to Arcadia police officials and Los Angeles County booking records.

A groundskeeper at the church called police after finding McGuown nude, sitting on the vibrator under some trees on the church property, Arcadia police Lt. Mike Castro said.

“He had a lot of pornographic material with him,” Castro said. The nude man also had a knife within reach.

Responding police officers found McQuown and took him into custody, the lieutenant said. He was expected to be booked for indecent exposure.

According to Los Angeles County Superior Court records, McGuown has a lengthy criminal history dating back to 1992. He already had a pending case for failure to register as a sex offender at the time of his arrest Friday.

In recent years, McQuown has been convicted of possession of drug paraphernalia six times, failure to register as a sex offender twice and trespassing, possession of a controlled substance and being under the influence of a controlled substance, records show.

In the 2000s, McQuown was convicted of lewd conduct in public, possession of drug paraphernalia twice, and possession of a controlled substance, according to court records. In the 1990s, he was convicted of indecent exposure five times, as well as trespassing.

Despite his numerous sex-related convictions, McGuown is not listed on California’s statewide database of registered sex offenders.

It was not clear Friday why he was not listed, though not all convicts sex offenders are subject to public disclosure of their information on the database.

Though indecent exposure is often considered a misdeamnor offense, because of his prior convictions, McQuown was booked on suspicion of a felony, police said.

He was being held in lieu of $35,000 bail pending his arraignment hearing, scheduled Tuesday in Pasadena Superior Court.