Thats my guess. Happened to us in Nikkis 66 dart at a red lite. We were waiting for the lite to change and the peddle went to the floor and didn't come back up. I feathered the e-brake into a parking lot, got it towed home, checked the fluid and it was low, looked at the inside of the rear wheels and the pass side was soaked. I threw in a new wheel cylinder, washed down everything with brake kleen and all was well.