this right here is why I said check for that plastic washer thing. when it fails, the only way to get them off is to pull the fuse or disconnect the battery.
for all vehicles, usually when the brake lights stay on like that it's because that little plastic "washer" thing on the backside of the brake pedal has finally disintegrated; are there small pieces of broken plastic laying on the floorboard? Maybe the right-side light bulb is burnt out now...