A former highway patrol officer has gone on trial in the District Court in Nelson accused of causing an accident in which two motorcyclists were badly injured.
Anthony Dale Bridgman, 58, who retired from the police last year, has denied two charges of dangerous driving causing injury.
The Crown says that in December 2007, Mr Bridgman made a U-turn on the Upper Buller Gorge Road in order to chase a motorcyclist, when two following bikers crashed into his patrol car.
Wellington men Brent Russell and Marty Collins were thrown from their bikes and suffered fractures.
Mr Bridgeman's defence is that there was sufficient visibility for traffic and that the motorcyclists were speeding.