Four of the six victims who passed away alongside singer Jenni Rivera in a Dec. 9 plane crash are being represented by their families in a lawsuit filed Thursday in Los Angeles against Jenni Rivera’s company and the owner of the plane which was carrying Rivera and her entourage when it nose-dived from 28,000 feet. "We cast a wide net to find out exactly who is responsible and it may be that they’re not," attorney attorney Paul R. Kiesel at a press conference in Los Angeles.