PA State Police Commissioner Jeffrey Miller said:

Apparently, he did make a statement to his wife on the phone that he was acting out in a way to achieve revenge for something that happened 20 years ago. And I think that the location, the school, was probably chosen because it provided a close opportunist -- you know, an opportunity to attack where he knew he had young kids. For some reason I believe just based on what we know now at this point -- I mean, we've got a lot of work to do, but from what we know at this point, it seems as though he wanted to -- to attack young female victims, and this is close to his residence. Th...

PA State Police Commissioner Jeffrey Miller said:

Apparently, he did make a statement to his wife on the phone that he was acting out in a way to achieve revenge for something that happened 20 years ago. And I think that the location, the school, was probably chosen because it provided a close opportunist -- you know, an opportunity to attack where he knew he had young kids. For some reason I believe just based on what we know now at this point -- I mean, we've got a lot of work to do, but from what we know at this point, it seems as though he wanted to -- to attack young female victims, and this is close to his residence. That's the only reason we can figure that he went to the school.