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AUSTIN (AP) — Police are investigating whether an 18-year-old Texas pet shop worker who was believed to have been bitten by a cobra took his own life.

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Austin police Detective Derek Israel says they are investigating Grant Thompson’s death as a possible suicide after talking to family members and venomous snake experts. A justice of the peace will make the final determination after an autopsy review.

Thompson was found unresponsive in the parking lot of a home improvement store earlier this week. The cobra was missing for two days before it was found dead along an interstate frontage road.

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Medical examiners say they scrutinized the cobra’s fangs to see if they match puncture wounds on Thompson’s wrist.

The Austin American-Statesman reported that police didn’t disclose further details about their findings.

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