SANFORD, Fla. - Opening statements are underway in the case of a Florida man accused of shooting at former neighborhood watch volunteer George Zimmerman in a road-rage case.

Testimony is expected to begin Tuesday in Matthew Apperson's attempted second-degree murder trial. Authorities say he shot at Zimmerman during a traffic incident last year.

Zimmerman told officers he had been driving in the Orlando suburb of Lake Mary when Apperson got behind his truck, yelled and fired a gun at his car a short time later, leaving a bullet hole in a window.

A police report says Apperson had a fixation on Zimmerman.

Zimmerman was acquitted three years ago in the fatal shooting of Trayvon Martin, an unarmed black 17-year-old. That case sparked protests and a national debate about race relations.