HOUSTON (AP) — Three teenagers were arrested after two of them told police they dug up a secluded grave north of Houston, removed the skull from the coffin and converted it into a marijuana bong.

Police found a grave in the city of Humble that had been disturbed, but were still investigating the rest of the teens’ story, Houston police Sgt. John Chomiak said.

Kevin Wade Jones, 17, and Matthew Richard Gonzalez, 17, both of Kingwood, were arrested Wednesday night and were being held on misdemeanor charges of abuse of a corpse, Chomiak said. The juvenile was referred to the Harris County juvenile justice system.

A woman who answered the phone at Gonzalez’s home declined comment. A telephone number for Jones could not immediately be found, and it wasn’t clear from court records if either had an attorney.

Police were interviewing Jones about the use of a stolen debit card when he told them about the grave theft, which purportedly occurred around March 15, according to court documents. Asked why Jones would volunteer such a story, Chomiak said, “We can only speculate and guess to what goes on in the criminal mind.”

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