Violent Chimp Attack in Stamford CT

I have been following this story for the past few days and it really is a crazy one. A 200 pound pet chimpanzee had to be shot by police on Sunday after without explanation attacked someone who pulled into the chimp owner's driveway. From what I have read so far it appears that this chimp was raised by its owner like a son and this was the first violent outburst that the animal had ever had.
The way this animal attacked the victim was absolutely crazy. The chimp dug its fingers into the eye sockets of the woman and pulled her face apart. I did some reading about chimps and apparently they can have up to five times the upper body strength of a full grown adult. The victim needed surgery to remake her face following the ambush and still is not ready to leave the hospital.
Just like any news story there are always little twists and turns that come out over time. One of the twists in this story that I find interesting is the fact that the chimp's owner gave the animal tea with a Xanax pill mixed into it earlier in the day due to aggressive moods that it was displaying on that particular day. It frustrates me that the owner could be naive enough to think that Xanax would work on a chimp the same way it works on a human to have a calming effect. The pill was not developed for chimp usage and their is no telling what kind of effects it would have on the animal.
The chimp seems to have been raised in a very loving way by its owner but, did it ever occur to her that she could have adopted a child or gotten married and started a human family?