Why? Probably because he didn't have a two-toed sloth available:
Link -via The Agitator | Photo (unrelated) via Flickr user euthman
According to investigators, the altercation occurred when the suspect was selling the carcass to the victim, who planned to eat the animal.
The pair apparently began arguing over the price of the item when the man twice threw the armadillo at the woman.
The animal first struck the woman in the leg and then in her chest.
Link -via The Agitator | Photo (unrelated) via Flickr user euthman