From August 31, 2009 WDSU channel 6:
Carlos Calderon, 39, and Luis Calderon, 26, were found dead around 11:15 p.m. Sunday in an apartment at 1132 Carondelet Street. Two other men, a 38-year-old and a 31-year-old, were found in the apartment with multiple stab wounds.
The Calderon brothers lived in the same building and had been involved in an argument with the two survivors earlier Sunday, police said. Later that night, the brothers -- armed with knives -- forced their way into the other men's apartment, police said.
The roommates also armed themselves with knives and a handgun, and they managed to defend themselves by stabbing and shooting the men, police said.
Homicide detectives and representatives from the District Attorney's Office met Monday and determined that the men's actions were justified.