When: October 2012
Where: Houston, TX
Snack: Cheetos

Sibling beef is common (at a certain age), but there's no excuse for beating your little sister unconscious over Cheetos. (Also, Cheetos again? Really?) After returning to the apartment that she shares with her 10-year-old sister, 23-year-old Deby Mejia snapped at the sight of the girl eating Cheetos. Mejia allegedly beat her sister with an extension cord, then slammed her head into the ground until she passed out.

Mejia was forced to look after her sister when their mother was deported to Honduras in 2006. She admitted to police that she never loved her sister and resented her birth. She was arrested and charged with child abuse, but still feels zero remorse.

She's far too old to be jealous of her younger sister.