you are under arrest for the attempted murder of vernon holbrook. >> detectives were convinced they hadthe two people who'd attacked vern that saturday in may. but they also knew or thought they knew there was a lot more to the story. these suspects certainly weren't trained, hired assassins. they were so clumsy, they'd even used their own phone. but where would this lead? why would two people who never met vern holbrook want to kill him? >> coming up -- >> the bells and whistles definitely started going off. >> a sudden trail of clues, security video, text messages, a secret code. was vern worth more dead than alive? >> all of a sudden, i saw this he was fearful of his life. >> when "dateline" continues. - grocery outlet is the home of "wow" savings. "wow" means you save 50% or more. there are three stages of "wow". denial. - is this price right? - acceptance. and boooyah! wait for it. boooyah has three "o's". ♪ grocery outlet bargain market ♪ announcer: this week, assorted flavors of power bars are just four for a dollar. food. water. internet. we need it to live. but what we don't ne