That sounds like poor Jack Lees.
The imbecile owners of the XL were seen encouraging it to lunge at young children and passersby.
Then the moronic owner began punching it in the head-
Just for “fun” by the looks.
Poor Jack didn’t stand a chance.
Lots of owners have them on very long leashes ( if leashed at all) and a long leash means the dog has far more power - simple physics.
They pull free of the owners who are incapable of managing them.
There was a man in the media bragging that only he was capable of holding two of these beasts-
But if they decided to turn, he’d not be able to hold them back.
I’m used to horses, but when I felt the strength of an XLB, the low centre of gravity, give me a 17hh horse to manage any day in a leading situation -much easier.