Zombie Police, Locked & Loaded (Ready to Go!)

https://en.wikipedia.org/wiki/Lists_of_killings_by_law_enforcement_officers_in_the_United_States

specific examples:
October 22, 2013, murder of Andy Lopez, 13 by Sonoma County Sheriff
https://en.wikipedia.org/wiki/Killing_of_Andy_Lopez
March 14, 2016, Andy Lopez's Sonoma County attorney Steven Mitchel, 56 (murder by suicide cover story)
https://www.cbsnews.com/news/missing-california-attorney-steven-mitchell-washes-ashore/
October 1, 2017, Las Vegas shooting, John Pelletier. Killed 60 music concert goers.
https://www.usatoday.com/story/news/nation/2023/08/15/maui-police-chief-john-pelletier-las-vegas-response/70594938007/
June 2, 2020, murder of Sean Monterosa, 22 in a Walgreen's parking lot by an AR-15 assault rifle and Vallejo Police Office Jarrett Tonn.
https://www.msn.com/en-us/news/crime/vallejo-police-officer-who-killed-sean-monterrosa-gets-his-job-back/ar-AA1g3EeP
August 8, 2023, Lahaina Direct Energy Weapon Attack, covered by John Pelletier.
August 23, 2023, Cook's Corner mass shooting by ex-Police City of Ventura SGT John Snowling.
https://en.wikipedia.org/wiki/2023_Trabuco_Canyon_shooting