American Football - What should be the penalty for the Patriots underinflated balls vs the Colts?

[The_Yoda]

yvanjean said:
Non-story if anything punish the referee for not inspecting the ball correctly.

The balls are inspected then given back to the team, at which point thy can tamper away if so desired.  As another poster pointed out the Refs should be the ones to hold onto the balls after inspection.