Ronald Gasser is charged with second-degree murder in McKnight’s death.
His trial opened Tuesday in a New Orleans suburb with jury selection. Icy weather caused the courthouse to close Wednesday and Thursday.
The courthouse was scheduled to re-open Friday, when opening arguments could begin.
The shooting followed a traffic confrontation. Police said the men cut each other off in traffic on a New Orleans bridge and on roads in neighbouring Jefferson Parish. The vehicles had stopped and McKnight was standing outside Gasser’s car when he was shot. Gasser’s attorneys say McKnight was the aggressor and are expected to pursue a self-defence argument.