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There will be no charges against NASCAR driver Tony Stewart after his car struck and killed fellow driver Kevin Ward Jr. at a dirt-track race August 9th.  A grand jury finished hearing the case earlier today.  The 20-year-old Ward had climbed out of his car after being spun out and went onto the track to seemingly confront Stewart when he was hit by Stewart's car. 

Authorities announced today traces of marijuana were found Ward's system after the accident.  Stewart, a three-time Sprint Cup champion, skipped the next three races on the circuit before returning August 31st at Atlanta Motor Speedway.  

NASCAR has since put new rules in place prohibiting drivers from leaving their vehicles or going out onto the track after a crash.  Drivers must wait for assistance by track personnel unless there are extreme circumstances such as fire or smoke in the cockpit. 

PHOTO: Getty Images