Oh………………………………

He actually was a radiological technician before he played one in the movie.

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Suspected serial killer....

He’s not an actor. He was playing a radiologist because he was a radiologist

friedkin liked to do that a lot. in french connection the police mechanic who tore the drop car apart was the actual guy who did that for the NYPD.

It's called method acting.

Is he the one that put that shit in Regan's neck that made the blood spurt? If so, then I'm not surprised he's a killer. Of all the scenes in that movie, that's the only one that makes me uncomfortable.

Method acting is where an actor actually lives like the character he's portraying to research a role to make the performance more believable.

Hiring a real life professional to portray a character like their actual selves is just a casting choice.

Damn, and the extra murders for which he was suspected were the real life basis for the movie Cruising

First time I saw that scene I got lightheaded