A pedestrian was killed after being hit by a car while lying on the road... How did the court decide? = Korean report

A truck driver in his 60s who hit and killed a pedestrian lying on the road was acquitted on appeal.
According to the legal community, on the 30th, the Daejeon District Court decided to
The court handed down a not guilty verdict to Mr. A (64), who was indicted on suspicion of violating the law. Mr. A was arrested at 8:55 a.m. on July 4, 2020, in Nonsan, Chungcheongnam-do.
While driving a truck on a road in the city, he failed to notice Mr. B (86) lying on the road and ran over him. Mr. B was taken to the hospital and died about seven months later on February 11, 2021, in Ota
He died of septic shock in the hospital. The first trial found that the defendant was negligent in hitting the victim while driving without looking carefully ahead or to the left or right.
"It is difficult to determine whether the fracture of the femur was caused by the fall or by external force."
Furthermore, the court found that at the time of the accident, the victim had already collapsed and was lying down.
The prosecution argued that while Mr. A was in a state where he was in a wheelchair, it was highly likely that the wheel of the defendant's vehicle ran over his right arm. The prosecution appealed the verdict of the first instance that acquitted Mr. A. However, in the appeal court, the prosecution stated that "As a result of the reinvestigation,
"The evidence presented by the prosecution alone is insufficient to prove that the victim died in a traffic accident caused by the defendant," and "there is no other evidence to prove this, so we have acquitted the defendant."
The trial was justified," he ruled.