Investigators said they received an anonymous tip that Roger Von Bergendorff had stayed at the Extended Stay American hotel on Boulder Highway before moving to a different Extended Stay several miles away.

A vial of deadly ricin was found in Von Bergendroff's room at the second hotel after he had been knocked into a coma last month.

Police were still looking into the tip Wednesday; however that wasn't too reassuring to guests at the inn. They told the Las Vegas Review Journal that they were concerned that perhaps they had been exposed to ricin, which is toxic in very small amounts.

"Why hasn't Homeland Security (OTCBB:HSCC) checked that room?" asked guest Alice Neirynck "He lived there for more than a year. If he was making ricin, it would have been there."

Extended Stays America told the Review-Journal that it couldn't confirm that Von Bergendorff was a guest due to company privacy restrictions.