What is Dr. Elliott doing in this scene?

In Dressed to Kill, when Dr. Elliott was shot by the female police officer, as SHE tried to kill Liz, we hear from Murino and Dr. Levy that Dr. Elliott is sent to an insane asylum. Then after some time this appears, we can see that a nurse is taking care of mentally disabled people who were sleeping and when she tries to cover Dr. Elliott with a blanket HE grabs her by the throat and makes her to lose consciousness, after this he strips her and the scene goes away.

I'm having trouble in understanding this scene because Bobbi used to attack those women who aroused the male side of HER. But in this scene, why is Dr. Elliott, that is HE, killing her (or rather stripping her)?