. >> former patriot running back kevin faulk says the checks are thorough and intensive.k do they go? >> if you've done something in middle school, they will go back and find somebody around that time and ask them. >> trying to head off trouble before the draft, hernandez goes on the offensive writing a letter to the patriots director of personnel. if you draft me as a member of the new england patriots, he wrote, i will willfully submit to a biweekly drug test throughout my rookie season. >> day three, round four. >> prior to the draft, aaron hernandez was expected to be a first round pick and no later than a second round pick. >> with another selection, they go aaron hernandez. >> he ends up the 113th pick, passed over until the fourth round. >> i have to believe that him falling so far is more than just a story about marijuana. there were questions raised in background checks about him that caused teams to say, we're going to downgrade him on our draft board. >> but during his first year with the patriots, he proves himself. >> tight end in a receiver body that could p

. >> former patriot running back kevin faulk says the checks are thorough and intensive. >> if you donee school, they will find somebody that was around that time and ask them. >> prior to the draft aaron hernandez was projected as a player that could be a first round pick and no later than a second round pick. >> now, with another selection, they go aaron hernandez. >> he ends up the 113th pick, passed over until the fourth round. >> i have to believe that him falling so far is more than just a story about marijuana. that there were questions raised in background checks about him that caused teams to say, we're going to downgrade him on our draft board. >> but during his first year with the patriots, he proves himself. >> tight end in a receiver body that could play running back that could return punts, return kicks. >> that talent gets the 22-year-old a five year, $40 million extension. what no one knew at the time, one month before he signs that deal, the football player parties at a boston club. that night, two young men are shot and killed after leaving that same club by a man driv

. >> kevin faulk's old teammate aaron hernandez is on trial for murder in massachusetts, but this newired patriot still has his back. sg>> i wanted to tell him that has somebody on his side that is praying for him. >> and not even two more murder charges in the so-called case changed faum's opinion of the player he knew. >> i get the question all of the time, do you think that your boy did it? i say no, because i don't want to think that he did it. >> faulk's friend is getting a solid defense inside of court, too. >> aaron hernandez is an innocent man. >> reporter: hernandez' lawyers win a court battle to keep alexander bradley to keep from testifying that hernandez shot out his right eye, and they win the motion barring any mention of the upcoming trial of a boston double murder, but the main contention of hernandez' lawyers. >> the investigation will show that it was sloppy and unprofessional. >> reporter: and during nearly every cross-examination, the lawyers tried to raise reasonable doubt by questioning the competence of investigators. >> as an experienced police officer, you und