Mexican Mafia members run profitable illegal Los Angeles casinos from behind bar

Illegal casinos in Los Angeles are cropping up everywhere from warehouses to homes and are largely benefiting incarcerated members of a prison gang called the Mexican Mafia, authorities say. 

Richard Velasquez, a Los Angeles County sheriff’s detective, told the Los Angeles Times that casitas, Spanish for "little house," are "everywhere, to be honest with you."

"It’s hidden in plain sight. You don’t know that it’s there till you know that it’s there," he said.