A shooting that left three men dead at a home in southeast Houston had all the signs of a narcotics robbery, known often on the streets as a "drug rip," police said late Wednesday. Police are searching for a 2011-2015 model gray Chevrolet Malibu that may be linked to the shooting. Officers did not have a detailed description of the suspected gunmen but said they were looking for three black men, at least two of whom were wearing red pants and hoodies.