Twenty-three year old Kerby Revelus fatally stabbed his 17-year-old sister, Samantha, decapitated his 5-year-old sister, Bianca, in front of a police officer and then turned toward his 9-year-old sister, Sarafina, with a knife in his hand before officers shot him dead in what their chief described as “a killing field” in Milton, Massachusetts.

According to reports, there was nothing to indicate Kerby “was capable of something like this or that this tragedy could have been prevented”.

He had been in trouble before, but his criminal record does not show anything close to the level of brutal violence he unleashed on his sisters on Saturday.

In September 2004, he was charged with assault and battery after his then 17 year-old sister, Jessica, called police after he punched her over a phone bill at 19. She declined medical attention and told police she did not want to get a restraining order against her brother. He was arrested for assault and battery in August 2004 after he was involved in a fight with several other teenagers. Then in December 2005, he was charged with carrying a firearm without a license after he tried to buy alcohol at a liquor store.

Investigators believe Kerby had been agitated since Friday night, when he got in a fistfight with a neighbor. He attacked his siblings with a kitchen knife on Saturday while their grandmother, who neighbors say lives on the first floor, was doing laundry in the basement, investigators said. The children’s parents, Regine and Vronze Revelus, were not home.

Sarafina had surgery Monday and is expected to survive. Bianca, Samantha and Kerby will share a single funeral service and be buried together on Saturday.

Our thoughts and prayers are with the Revelus family.

Another sex scandal has occurred at Oprah Winfrey’s South African school for girls, although details are not clear.

The Times of South Africa reports that seven students have been expelled for sexual misconduct. Another South African publication, Rapport, says the girls tried to force other students into sexual relationships with each other and tried to touch them “intimately”.

Lisa Halliday, Oprah’s South Africa spokeswoman, responded to the situation on Monday, saying: “We consider this to be a confidential school matter.”

This is the second major incident at the school. In 2007, Tiny Makopo — the school’s matron — was charged with indecent assault and one charge based on an allegation she fondled a 13-year-old girl. She has since plead not guilty, and the case is still under investigation.

A Dallas police officer stopped Houston Texans running back Ryan Moats for running a red light as he rushed to be by his mother-in-law’s bedside in her final minutes at Baylor Medical Center in Plano, TX.

By the time the cop was done with his power-play and let Moats go, however, his mother-in-law was dead. His wife defied the cop’s orders, rushed into the hospital and managed to see her mother just moments before she passed.

The officer has apologized for his actions and is on paid leave pending an internal investigation. Check out footage from Dallas’ WFAA newscast above.