saw movie nurse

Question for people who saw the movie Changeling?
Okay so that Mrs. Collins (the main character) is put into the room of the psyche and nurses are like pressure washing it with the hose, and then, when performing the nurse put on a glove and told Mrs. Collins to open her legs and she submitted the whole hand up there, why did he do that? Is there any body know what the purpose of that was???? I was really curious lol
To see if he was hiding something, weapons, etc. They do this to people who go to jail too, make sure not confiscate anything. Very sad to tell you the truth. Clint Eastwood (director), probably showed that to make the audience sympathize more so for Ms. Collins and hatred of the hospital staff further together with the police. I love that movie. I was thrilled on many levels. Clint Eastwood is a genius.
SAW 0.5