Matthew Apperson, the man who allegedly fired into George Zimmerman’s pickup truck in May in a reported road rage shooting, will be charged with attempted second-degree murder, prosecutors say. According to the AP, this charge was upgraded from an aggravated assault charge.

Apperson planned to bring his case to court as a Stand Your Ground defense, claiming that he acted in self-defense when he and Zimmerman met on the road in Lake Mary, Fla. According the AP’s report, prosectors say that Apperson had a “fixation on Zimmerman,” which was part of the reason prosectors upgraded the charges:

A prosecutor on Thursday upgraded the charges against Matthew Apperson to attempted second-degree murder. Apperson earlier had been charged with aggravated assault and battery for firing a gun into Zimmerman’s car during a traffic run-in last month. Zimmerman had minor injuries.

Zimmerman was wounded during the altercation by a piece of glass from his pickup truck’s broken window, but was not hit by Apperson’s bullet.

Image via AP.