The contents of the letter are interesting in their own right, but there are 2 aspects that strike me as particularly interesting. First off, he doesn't seem to regret killing his wife, more the consequences of his crime. He doesn't mention her by name or say that she didn't deserve it.
Secondly, the person he's corresponding with, Fredrick Brennan is fascinating in his own right. He's one of the 3 central characters inside the HBO documentary, Q: Into the Storm, and has a totally bizarre relationship with Jim and Ron Watkins, the two figures currently steering the ridiculous QAnon set of conspiracy theories. It's a very strange confluence of interests.
Secondly, the person he's corresponding with, Fredrick Brennan is fascinating in his own right. He's one of the 3 central characters inside the HBO documentary, Q: Into the Storm, and has a totally bizarre relationship with Jim and Ron Watkins, the two figures currently steering the ridiculous QAnon set of conspiracy theories. It's a very strange confluence of interests.