My thoughts exactly.
Here’s some video on inducing a heart attack- from 1975 - I posted it before in case you didn’t see it.
http://www.youtube.com/watch?v=BSEnurBApdM&feature=player_embedded
Breitbart was dealing with dynamite - he stood to make trouble for people receiving billions of dollars in graft! Not hard to think it’s possible when there are already many people who would kill you for your pocket change.
He has a record of successfully uprooting weeds like Anthony Weiner. Breitbart was a real threat.
He should have released the tapes immediately, he would have been safer.