The attack was really quite gruesome. I won't repeat, but the AP report has parts of the 911 call transcript if you want. So, what's the connection? Xanax. At least that's one theory:
Police said that Travis was agitated earlier Monday and that Herold had given him the anti-anxiety drug Xanax in some tea. Police said the drug had not been prescribed for the 14-year-old chimp.
In humans, Xanax can cause memory loss, lack of coordination, reduced sex drive and other side effects. It can also lead to aggression in people who were unstable to begin with, said Dr. Emil Coccaro, chief of psychiatry at the University of Chicago Medical Center.
"Xanax could have made him worse," if human studies are any indication, Coccaro said.
Stephen Rene Tello, executive director of Primarily Primates, a sanctuary for chimps in Texas, said it is difficult to say what effect Xanax would have on a chimp, but he noted that chimps and humans have similar physiology.
Investigators said they were also told that Travis had Lyme disease, a tick-borne illness with flu-like symptoms that can lead to arthritis and meningitis in humans.
"Maybe from the medications he was out of sorts," Stamford police Capt. Richard Conklin said.