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Los Angeles authorities identified a woman and her brother who were fatally stabbed in full view of witnesses during a Zoom call.

The LA Sheriff's Department said Carol Brown, 67, was on a Zoom call meeting at her Altadena home on Monday, March 22, when she was attacked.

Faculty members at Pasadena City College witnessed the attack on Zoom and called the police.

Authorities responded to the address and found a Black male stabbed multiple times in the driveway. He was later identified as Brown's brother, Kenneth Preston, 69.

Police also located Brown deceased inside the home on N. Marengo Avenue in Altadena. Brown and Preston shared the home.

Brown was a faculty member at Pasadena City College for over 14 years, according to her LinkedIn.

Police were still processing the crime scene when Brown's son arrived "driving one of the victim's vehicles."

Robert Cotton, 32, told police he was a resident of the home. He was arrested at the scene after a brief struggle (see video below).

Cotton is being held in jail on $4 million bail. Police do not have a motive for the crimes.

"This is a horrific case in which the mother's work colleagues witnessed part of the attack while on a Zoom call and called the authorities," District Attorney George Gascón said in a news release.