That's because I accidentally pasted the title for URL. Fixed now.
How much physical injury to a shoplifter should be permitted?
I do not think the extent of injury should matter. Had he had a heart attack during the confrontation, should the store be on the hook for "wrongful death"?
The perp sustained injuries while the LPOs tried to restrain him until the police arrived. He resisted and was unlucky in that him falling down caused significant injuries. But without his resisting and without him shoplifting he would not have sustained any injuries.
Now had the LPOs sought to inflict deliberate injury that would be separate assault and battery. But criminals should not get to sue for injuries sustained during the crime itself. I mean, given US tort law Home Alone 2 should have been a courtroom drama where Harry and Marv sue the McAllisters for millions. Homeless Alone is the third installment where they are all, well, homeless having lost their house to the burglars ...