Keith, Jennifer, Jesse, and Sophia Caneiro lost their lives earlier in a house fire that police say was purposely set.

Now, Keith Caneiro's 51-year-old brother Paul is charged with the murders.

Fired engulfed the Colts Neck, Monmouth County home, as scene in the video below. But 50-year-old Keith was reportedly first shot, his 45-year-old wife, and the couple's 11-year-old son and 8-year-old daughter stabbed to death, according to Christopher Grammacioni of Monmouth County Prosecutor's Office.

Authorities say there are no other suspects in this case, charging Paul Caneiro with four counts of murder, aggravated arson, and other offenses.

According to 6abc.com, Paul Caneiro previously used gasoline to start a fire at his OWN home, also in Colts Neck.

No motive for killings has been revealed, but the Caneiro Brothers were partners in a  computer systems company and a pest control business.

SOURCES: 6abc.com; ABC7/New York; Monmouth County Prosecutor's Office/Facebook