Conversation so far:
What was Thompsons view on video games?
Thompson has heavily criticized a number of video games and campaigned against their producers and distributors.
Are there any other interesting aspects about this article?
His basic argument is that violent video games have repeatedly been used by teenagers as "murder simulators" to rehearse violent plans.
Did he give examples?
When McCoy was captured, a game console and a copy of The Getaway were in his motel room.
what is his evidence to support his claim?
he claims that scientific studies show teenagers process the game environment differently from adults, leading to increased violence and copycat behavior.
What was the result of this?
Thompson succeeded in getting the court to unseal a search warrant for McCoy's residence.
What was the findings of the search warrant?
the discovery of additional games State of Emergency, Max Payne, and Dead to Rights.
Were these findings significant?
he was not allowed to present the evidence to McCoy, whose defense team was relying on an insanity defense based on paranoid schizophrenia.
Was the case won?
CANNOTANSWER.

Question: Why was he not allowed to show the evidence?
Self-contained rewrite: Why was Thompson not allowed to show the evidence of additional violent games uncovered at McCoy's residence?