The Diamond Ring(White Walls)

I found it near the crime scene.
The crime happened a few weeks ago.
The crimnal was never caught.

I found the owner.
She's insane.
She's in an insane asylum.

I went to her.
To return whats her's.
She said keep it.

"This means alot.
But he was killed.
I found the murderer and killed him.

They locked me in here.
Here with horrid white walls.
You keep the diamond ring.

To remind you.

Don't get caught with the bloody knife.
Run and never be traped in these...
These four white walls."