I'd say yes if the teams had not already gone to the locker room. Shoot the FT(s) and send 'em to the locker room. If they have already headed in for halftime, my instinct would say that it's too late, although I don't have a rule to back it up. My vague interpretation is that the ball is "beyond dead" during halftime. (I'm sure someone is going to make a smart reply to this!
)