This is a true story.
This happened many years ago, and was told me by a man with spare time on his hands, who used to spectate in court to pass some of that spare time.
Lawyer – “You say you saw the defendant’s car involved in a road accident at the junction of X and Y?”
Policeman – “That is correct.”
L – “And where were you at this time?” P – “At the junction of X and Z.”
L – “So you were some 80 yards away when the incident occurred?” P – “Yes, I was.”
L, in incredulous accent – “So you were 80 yards away, but you say you knew this vehicle had been involved in an accident?” P – “Yes.”
L – “Then please tell the court how you knew this vehicle went through a red light?” P – “Because the light that I could see was green.”
L, triumphantly – “Ah, but how did you know that it had been in an accident?” P – “Because it went past on its roof.”