Question

Can anyone help me please with the name of an actor who appears in the film. He is the man who pretends to hold a rank in the armed forces and who gets interrogated by the police in the flat of the female undercover police officer. I thought i had his name from the credits but it was the wrong one and i cant seem to find him on the IMDB cast list. Just the character name will suffice if no one knows his real name.

Thank you!