It isn't known when Dorner wrote this, whether it was before or after the murderous rampage he's accused of began.

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The administrators of the funds benefiting the two slain officers said Friday they don't want money tainted by any association with Dorner, who went on a killing rampage to avenge people he said ended his law enforcement career.

NPR: Dealer Auctions Ex-LAPD Cop's Gun For Donation

With relatives of some of the 20 children killed in the Connecticut rampage looking on, Obama signed 23 executive actions -- which don't require congressional approval -- to strengthen background checks and expand safety programs in schools.

CNN: GOP balks at Obama's post-Newtown gun control proposals