What happened was that a family of 5 was confronted, in their home, by 3 masked intruders. The family was tied up.
The father managed to untie himself and escape. Then, with the aid of another man, he chased the robbers out of the house and down the street. The father cornered one of the robbers and beat him with a cricket bat. This beating, not surprisingly, left the robber with a degree of permanent impairment!
The father's reaction was considered to be intemperate and he was jailed for 30 months.
The robber, btw, was a career criminal with a long history...blah, blah, blah.
I don't know whether the father's reaction was the correct one, but it was understandable. I can think of few things worse than being tied up in my own home, by masked robbers. Just imagining that vulnerability is making my blood boil.