Some 100 protesters congregated on Shaw Ave. here near the spot where 18-year-old VonDerrit Myers was killed by off-duty police officer Jason Flanery.
The marchers, from all five New York City boroughs, called for reforms in the process of disciplining police officers who use unlawful force, and in police officer training.
His rampage ended during a stand-off with a military policewoman when Lopez took his own life.
Flint Farmer was laying face down on the parkway grass after being shot in the thigh and abdomen by Chicago police officer Gildardo Sierra.
A college student activist/hero is credited with saving the life of Rep. Gabrielle Giffords.