uknown late 70 movie with Jamaican man slashing a guys throat

[navyman4]

In the late 70s or so, (I was 6ish)

There was a movie with a Jamaican man in a prison cell lit with bluish light. He used a broken piece of glass to cut a mans throat. Then the scene turned into some sort of psychodelic scene with predator like heat vision type of imagery.

This is all I know.

I'll search the "penatentary" series to see if that's it.

[retrorussell]

Hmm.. maybe try THE HARDER THEY COME.