In the court room scene when "Lisa" is on the witness stand, a reference is made about the type of car etc. that was used in the crime. Both Vinny and Lisa comment that the "defense is wrong!" When it should be the "Prosecution is wrong." They are the defense, if they are wrong, they would lose the case.

You are wrong...I do not think you have studied law or been to law school or paid attention to the arguments. Gambini(or Jerry Gallo)has requested to treat Lisa as a hostile witness,which allows him to ask leading questions. He has recognized that the prosecution has misidentified the actual car and perpetrators of the crime, who drove mint green 1963 pontiac tempest. The defendants drove 1964 buick skylark convertible which resembles the cars of the actual killers. The burden of proof rests with the prosecution, not the defense. He only has to show reasonable doubt, and the prosecution loses the case. The defense reacts to the charges and evidence produced by the prosecution, thereby forcing prosecuter Trotter to move for a dismissal.