Missing Hammer in Prison.

[SPOOK0999]

I only asked because the prison does have quite a few cells, and I'm pretty sure more than one has a bed in it; it's hard to know exactly which one you've been checking.
Or is this the room that Daniel gets a flashback in, talking to a mother who has just helped her daughter escape?

It's the one with the door that has been broken off and is leaning against the wall in front of it. When you first start the level you will walk through the halls and come up to a stairway and a path to the right. It is in the hall to the right.