hotel detective
house detective
house dick

Soon, two men arrived; one was the hotel detective, the other the house physician.

The hotel detective says she doesn't seem to go out much.

One was the manager; the other a hotel detective.

A hotel detective had seen a man slip into Doc's room.

And they, he knew, are much more punctilious than hotel detectives.

Instead, he was greeted by a maid and the hotel detective.

He ordered the hotel detective to unlock another room and call the desk.

The hotel detective followed him with a shouted warning to touch nothing.

A police officer was waiting outside the door with the hotel detective.

He would give the wierdo five minutes before calling the hotel detective.