The Oklahoma medical examiner's office says suicide was the cause of death for the former executive director of Voice of the Martyrs ministry.

Tom White was found dead April 18 at the Voice of the Martyrs complex east of Bartlesville. A spokesman for the medical examiner's office says White died from a drug and alcohol overdose.

The Examiner-Enterprise reports that White suffered a diphenhydramine toxicity. Diphenhydramine is found in Benadryl and other over-the-counter drugs.

Police say White died amid allegations that he'd molested a 10-year-old girl. He was never charged or arrested. Bartlesville police say the abuse investigation is now closed.

The Voice of the Martyrs is a nonprofit that says it provides medical supplies, food and clothing to persecuted Christians worldwide.