You would be surprised what a psychopath would do to get out of trouble. They are often deceitful and try to place the blame on others (possibly in this case a snake), as well as lying for personal profit. They can and do make friends quite easily, usually to benefit themselves. As far as him crying, I didn't see or hear any interviews where he was actually crying but I may have missed them in the sea of things floating around with this story. The interviews I did hear with him, he was quite calm and seemingly NOT emotional. He even admitted it himself in the interview, but he said it was because he was "in shock" which very well may be true.
I'm not saying he did it, I wouldn't dare say either way until all of the details are known, but don't think for a moment that a true psychopath wouldn't or couldn't do something like this. My mother is currently a MHP and a counselor for mental patients in the past. She still sees things that others would find to be very unbelievable, or that mental patients are "incapable" of doing or thinking such things...that doesn't make them any less true.