Movie - Prisoner escapes to kill someone and then returns to cell

[icestation2]

I'm sure the film stared Max von Sydow although looking at his list of films on IMDb nothing seems to fit. The thread title sums up the plot although I have no idea why the prisoner would want to sneak back to his cell other than to give himself an alibi.

[Euryale]

Could it be this?



The Night Visitor (1971)



E.

[batman]

I would agree that it's The Night Visitor.