How can I find a friend released from prison

You check his last known address.

First please stop asking the same question over and over, all but this one has been deleted.

There is no "prison" search to determine where they move to upon release. If they maxed out, they would get a bus ticket and be gone, if they were on parole the parole department would know but they will not give you that data.

Assuming they are really a friend, you hope they look you up, perhaps contact somepeople you both know