Sure it does.It is called witness intimidation. If they could have got the cbbie to recant on just one aspect of the story, any aspect, they get his testimony tossed and can say the defence witness lied or changed his story. Prosecutors, especialy this on, sometimes are as bad as the crooks that roam our streets, facts be damned.
But the time stamp at the ATM and the video at the dorm tell their own story, i.e., when he was gone and when he got back.
Add to that a cab driver that first says he drove the kid, then recants.
It seems to me any lawyer could easily turn those facts into not only an alibi, but also pretty damning evidence of witness tampering.
All together it's hard to believe that the DA could be stupid enough to orchestrate such an attempt.