Published: Mar 21, 2013 2:05 PM EDT

LEHIGH ACRES, Fla. -- The Florida Highway Patrol tells WINK News Robert Salmon, 81, died of natural causes and not from a hit and run on Wednesday evening.  

Originally, troopers believed Salmon died from his injuries caused by a hit and run accident on Lake Drive in Lehigh Acres on Wednesday.  Thursday, after consulting with the Lee County Medical Examiners office and conducting a crime scene investigation, FHP determined there was no car involved in the incident.

Troopers say Salmon was standing in front of a mailbox on Lake Drive and for an unknown reason fell into the road and sustained critical injuries.  After being transported to Lehigh Regional Medical Center, Salmon was pronounced dead.

The investigation is still ongoing.

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