WD Brian

DALLAS (AP) - Muffins that made 18 staff members at a Dallas-area high school ill contained the active ingredient found in marijuana, Dallas County health department officials said Thursday.

Meanwhile, the FBI released frames from a surveillance video showing a young man delivering the muffins to Lake Highlands High School on Tuesday. The FBI said the man is considered a "person of interest" in the case.

If a suspect is arrested, he could face federal product tampering charges as well as local and state charges, FBI Special Agent Lori Bailey said. Tampering charges could carry a 10-year sentence.

"We don't take these types of events lightly when people are injured or there's the potential for injury," she said.

The muffins were left in a teachers lounge and eaten by school employees, who later complained of nausea and feeling lightheaded.

Seventeen of the employees who became ill were released from the hospital Tuesday. A hospital spokeswoman says that the remaining employee, an 86-year-old switchboard operator, was released Wednesday.

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ICQ: 191820826