"Uncovering the Decade-Old Grudge: Syracuse Shooter's Deadly Ambush on Officers"

TL;DR
Police are investigating whether Christopher R. Murphy, the Salina shooter who killed two police officers, harbored a decade-old grudge against law enforcement. Murphy had expressed ill-will toward law enforcement long after a 2014 arrest for drunken driving and resisting arrest, but there were no specific threats of violence. The investigation has not found any social media accounts or platforms expressing ill will toward police, and reports of Murphy's negativity toward police are still considered unconfirmed.
- Did Salina shooter who killed 2 officers harbor decade-old grudge against law enforcement? syracuse.com
- Man shot officers with ammunition four times state’s legal limit, more than 12 guns seized from home as evidence WSYR
- A Quiet Sunday Night in Syracuse, and Then a Deadly Ambush The New York Times
- Childhood friend of suspect investigated in aftermath of officers' murders CNYcentral.com
- A Solemn Return Home: Slain Syracuse Police Officer Michael Jensen's Procession to Hometown WKTV
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