Like I said, I'd have no problem with the Broncos going defense with their first three picks. Probably CB (yes, Trufant might be there) then DT then MLB. At the very least the Broncos should be able to get a starting caliber DT and maybe a MLB too.
At #28 look at the Broncos options, it's great: DT? WR? RB? CB? LB? S? Oline? All are very possible at the #28 spot.
I'm not thrilled with Te'o either. If he's there at 28 I'd rather the Broncos pass on him and take another position and then draft a ILB like Alonzo or Bostic later in the draft.