Violent, angry animals are nothing to play around with.

[Language and violence warning]

If you're wondering why they made such a big deal over this dog, here's why:

A "horrific scene" unfolded on the West Side Friday afternoon after a brutal dog attack claimed an elderly man's life and left three other people injured, officials said. ...

The first responders had to fight off the dogs before they could even tend to the victims.

The dogs were eventually captured and taken into county custody, and it turns out this isn't the first time they've been violent:

ACS Director Shannon Sims said the dogs will be placed in quarantine kennels until further notice. He added that these dogs, two females and one male, were involved in another attack two years ago, and were previously impounded by ACS.

All three dogs will be euthanized following the attack.