Tampa Bay Rays pitching prospect's wife, baby son and mother-in-law are 'murdered by his 18-year-old brother-in-law' - who then went on the run naked and attacked a TV reporter before he was caught by cops
- Wife, child and mother-in-law of pitcher Blake Bivens were killed on Tuesday
- Bivens, 24, is a Double-A pitcher with the Rays for the Montgomery Biscuits
- His family was slain in a horror home invasion in southern Virginia
- Suspect Mathew Bernard, 18, is the brother of Bivens' slain wife
- He was arrested after running naked through streets and attacking bystanders
