"...the psychiatrist, who is also a professor at the school, reported receiving a package believed to be from the suspect. Although that package turned out to be from someone else and harmless, a search of the Campus Services' mailroom turned up another package sent to the psychiatrist with Holmes’ name in the return address..."
I find it very difficult to believe that this isn't just CYA for the shrink. How is it that he "though" he received a package out of the blue from James Holmes but it turned out it wasn't from him. But magically, a second package showed up that was from him.
I know this is idle speculation, but I could certainly see that the shrink got a package from Holmes, opened it, debated the ethics of turning it over to law enforcement and then decided not to. After the killings he had to cover his own tracks so he calls the police and says, "You know, this may be nothing, but I think I remember a package that might have been from the shooter, but I can't find it." He describes a different package. The police come help him look and finding the package he describes they realize it was not from Holmes. But they conveniently do find another package that was from Holmes.
Please tell me why he "thought" he received a package from Holmes. But it wasn't from him. But another that he supposedly had not seen was.
He knows more than this story tells.
Sounds like a good CYA theory to me.