I am playing New Vegas on PS3, i have had many freezes while playing NV. I have learned to save extra frequently to counter this problem.

However, this new glitch is preventing me from completing a quest.

Quest: Return to Sender

At the end of this quest Chief Hanlon goes to his office and the player is to follow. After some dialogue you are to choose one of 3 options: Let him go, Turn him in, or Kill him.
If you choose turn him in, he is supposed to lock the door to his office, make an announcement and shoot himself. However after he locks himself in, no announcement is being made and the quest is impossible to finish.

Is there some trick to correct the outcome so that i can finish this quest the way its meant to be completed?

I have tried leaving the area, restarting PS3, and countless attempts have been made... all with the same faulty end.

any help would be appreciated.

I have earned the trophy for the quest by letting hanlon go, however i would rather my character turned him in so i didnt save it.
However, It would be nice to complete it the way its intended to be.