On the morning of February 2, 1961, Erwin Davis was driving his Chevrolet Impala southbound on Louisiana State Route 66 toward Bains. O.C. Roberts, who was driving a Pontiac with two other passengers, was headed north on the same road in the direction of Angola. When Roberts attempted to slow his car, the front left brake “grabbed,” causing the vehicle to cross the center line and veer into the path of Davisís oncoming Chevy. Davis suffered contusions to the head, shoulder, and chest, as well as a neck strain which aggravated a pre-existing arthritic condition. He was hospitalized for six days, wore a collar brace for 10 months, and was placed in traction while recuperating in his home.
According to Louisiana law, a plaintiff has the burden of proof to establish the essential facts that support his theory of recovery. At trial, Davis put on evidence showing that the accident occurred because Roberts’ car crossed the road’s center line and invaded Davis’ lane. This established a prima facie case of negligence against Roberts. A prima facie case means evidence which, unless countered by the defendant, would support the plaintiff’s theory of recovery. Here, Roberts had a duty to operate his car in a safe manner, which would include maintaining control of his vehicle and keeping it within his lane of travel. The movement of Roberts’ vehicle into the oncoming lane represented a breach of this duty, and pointed to negligence unless Roberts could rebut that presumption with his own evidence.
Roberts offered the testimony of Alvin Doyle, an automobile consultant who inspected Robertsís Pontiac after the crash. Doyle testified that the brake “grabbing” sensation Roberts felt just before the accident was due to excessive grease on the left front brake drum, which was the result of improper lubrication of the ball joint. In Doyle’s opinion, the “accumulation of grease was so obvious as to merit the attention of any conscientious grease man and to call for replacement as well as removal of the grease deposits.”