Houston News: UT Austin Resin Substance Negative

The FBI says it's conducting further tests to verify if a powdery substance found in a University of Texas at Austin dormitory could be ricin, reports Houston News.
Preliminary tests showed that the substance was the potentially deadly poison. But officials say additional tests came back negative or inconclusive.
The dorm's 400 residents were evacuated last night while hazardous materials crews cleaned and sanitized the dorm room and laundry room where the substance was found. They were back in their rooms by this morning. School officials say no students have shown symptoms of exposure such as dizziness or respiratory problems.
19-year-old freshman Kelly Heinbaugh says she found the powder when she opened a roll of quarters to do laundry.
School officials are confident all students will be fine because people with ricin poisoning develop symptoms within a few hours of exposure.
The substance was sent to the federal Centers for Disease Control and Prevention for further testing. The incident was being investigated by the FBI's Joint Terrorism Task Force.
Ricin is extracted from castor beans. It can be added to food or water, injected or sprayed as an aerosol. A small amount of ricin that is inhaled, injected or ingested can kill a person within 36 hours.

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