Investigators now think that Hernandez committed 2 murders in 2012 and he was afraid that Odin Lloyd was going to reveal Hernandez' involvement in those murders.
I am not surprised that he was released so quickly. I believe that the Patriots wanted to put as much distance between the club and Hernandez as quickly as possible. I don't think that Tebow will play TE, they still have a good TE in Rob Gronkowski on the roster and he done damn good in a backup roll last year. They also have 4 other TE on the roster, but I'm sure some of those will be cut when they have to start trimming their rosters to the mandatory 53/45 active players.
BTW, I just heard that Hernandez' has had bail denied again.