Is there any real reason to believe there were any?

His sister drove him there. For some reason she gets a pass.

If you call getting shot and killed by the gunman "a pass".

Until you follow all leads, you cannot discount them.

they will get them by the computer and by the websites.

There is no reason except for hard to use implementations that the computer isn't encrypted.

If you're fine with phone encryption, you gotta expect the same for computers.

why are you so sure about that?