Stricker on my deadbolt broken - in locked position?
Not optimum, but worst comes to worst get an angle grinder, stick it into the edge between door and frame, and cut the deadbolt in half. Or, you could try to demolish the latch assembly from the hole in the door enough to pull the bolt out. Either way, you might have some damage to the surrounding areas.
Have you tried lubricating the latch mechanism and then really putting some torque on it?