Scott Simon CBS Miami

(CBS/AP) FORT LAUDERDALE, Fla. - Authorities in South Florida say a man has been charged with murder after he pocket dialed 911 and was allegedly recorded discussing a plan to kill a man who was later found shot to death.

The Broward Sheriff's Office says 24-year-old Scott Simon is charged with first-degree murder in the May 5 shooting of 33-year-old Nicholas Walker. Walker was shot while driving his car onto an Interstate 95 on-ramp.

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According to CBS Miami, when police arrived at the crime scene, Walker's car was crashed into a guard rail. After putting out a fire, they found the victim dead of gunshot wounds.

Authorities say Simon is heard on the 911 call telling someone he's going to follow the victim home and kill him. But investigators say they believe Simon coordinated the killing and did not pull the trigger himself.

The shooting happened after Walker got into an argument with other men at a Waffle House restaurant, police said.

Authorities are still looking for two other suspects.