A Florida man charged with shooting at George Zimmerman must wear a monitoring device while he is out on bail.

Judge Debra Nelson on Friday ordered Matthew Apperson to wear the GPS device so Zimmerman will know when he's close by.

Apperson's attorney argued during a brief hearing that the monitoring was unnecessary.

Apperson was charged earlier this month with aggravated assault and battery for firing a gun into Zimmerman's car during a traffic run-in. Zimmerman had minor injuries.

A police report says Apperson had a fixation on the former neighborhood watch leader and had recently been admitted to a mental institution.

Zimmerman was acquitted of any crime two years ago for fatality shooting unarmed black teen Trayvon Martin. His acquittal sparked protests and nationwide discussions about justice and race.