Police in Lake Mary, Fla. said they received a 911 call Tuesday from a man who alleged George Zimmerman threatened to kill him during a road rage incident.

Police told Orlando TV station WESH that the unidentified man called police after a driver in a gold Honda Ridgeline, who he believed to be Zimmerman, started yelling at him at a stop light.

“Why are you pointing your finger at me? I (expletive) kill you. Do you know who I am?” the driver allegedly said, as quoted by WESH.

The man ultimately decided not to press charges. Officers told him it would be difficult to prove the man who allegedly threatened him was Zimmerman, according to a police report obtained by the news station.

Zimmerman has had several run-ins with police since he was acquitted in the 2012 fatal shooting of Trayvon Martin. He was charged with aggravated assault after pointing a gun at his girlfriend, and prior to that arrest he was involved in a domestic violence incident with his estranged wife.

There are conflicting reports about whether Zimmerman acknowledged the alleged Tuesday road rage incident, however.

Police caught up with Zimmerman Wednesday, after the same man called to say that he was being followed, according to WESH. The news station reported that Zimmerman told police he was in the area for a doctor’s appointment.

Zimmerman admitted to exchanging words with the man when confronted by police Wednesday, according to a report from Miami TV station WSVN. The same man had made a second 911 call to say Zimmerman was waiting for him at work and that he felt worried for his safety, according to that report.