You know, that's another point. Excessive force is definitely possible here based on the scene description. I'm not clear how they can lay down 70 rounds on one target in a hallway unless they were completely incompetent as a SWAT team.
By my count, depending on the weapon system and magazine capacity, there were no less than three separate weapons fired at this guy, all three of which would have almost completely emptied their magazines. This assumes they were using 30 round magazines.
Assuming these guys assaulted with MP5s with 30 round magazines and a rate of fire of about 700 rounds per minute, they would have fired for approximately 5 seconds each, near simultaneously, on full auto, to put down 70 total rounds. A properly trained marksman and point man should be able to fire less than 5 rounds to eliminate the threat.