(Associated Press) There is no doubt who is responsible for the Newtown school massacre. The shooter is dead and the prosecutor handling the case has said he does not expect any charges.

Yet authorities are continuing to keep search warrants and police records secret. Media outlets have pressed for the release of more records, which could shed light on a crime that has revived the national debate over gun control and could change the way guns are regulated.

The massacre has led to proposals for universal background checks on gun buyers and bans on assault weapons and high-capacity ammunition magazines. It also prompted reviews of school security and mental health care and led to proposed legislation in Connecticut that would forbid arcades and other establishments from allowing children under 18 to play point-and-shoot video games.

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