During a press conference, LAPD Deputy Chief Alan Hamilton noted that the shooting stemmed from a dispute between two parties in an apparent drug deal gone wrong. "Our preliminary investigation has revealed that the dispute centered around a narcotics transaction in the area," Hamilton said during a press conference Saturday evening.

Mark Elton Connole was charged with one count of murder and three counts of attempted murder after he allegedly opened fire in the supermarket's parking lot on April 1. According to the Los Angeles Police Department, the shooting stemmed from an apparent drug deal gone wrong.

One person was killed and three others were seriously injured Saturday in a drug-related shootout outside a Trader Joe's grocery in Los Angeles, police said. The shooting was reported at 3:45 p.m. in the community of West Hills in the San Fernando Valley, Los Angeles Police Officer J. Chavez said.

A 34-year-old man was charged Tuesday with murder and attempted murder in a shooting in the parking lot of a Trader Joe's at a busy West Hills shopping center.