Supposedly McAfee antivirus software turned awful after being taken over by Intel. I don't have a source on that, but I've seen this sentiment in a few places.

As for some murder scandal, I think it makes sense to check out his side of story: https://www.reddit.com/r/netsec/comments/3hr9f0/i_am_john_mc... https://www.reddit.com/r/netsec/comments/3hr9f0/i_am_john_mc...

The entire AMA is quite interesting, though he seems a bit paranoid indeed (on the other hand - if there's some truth in Belize government opressing him, I'm not surprised).