Benjamin McDonald, 51, was arrested after prosecutors said he strangled his girlfriend.
Retired Correction Officer Willie Groomes followed Gilbert Drogheo off a subway train and shot him.
Joscelyn Every was the only one immediately charged in the fight that lead to his friend's death.
City Councilman Corey Johnson is holding a hearing on Rikers' health care provider, Corizon.
The new rule also caps solitary confinement time to no more than 30 days consecutive for all inmates.
Brian Solano shot and killed Willie Lora in the lobby of 1566 Macombs Road, police said.
State reports show that four Rikers Island deaths were blamed on the prison's medical provider.
Inmate Victor Woods was being held on a drug charge when he went into convulsions, authorities said.
The state called for changes in Corizon's protocols after the deaths, but still awarded it contracts.
Department of Correction Commissioner Joseph Ponte laid out a list of proposed reforms for Rikers.
As of Aug. 10, the number of felony assaults had risen by 58 percent compared to last year.
The curfew was instituted in order to control violence at the troubled jail complex.
U.S. Attorney Preet Bharara's report found alarming treatment of incarcerated adolescents at Rikers.
The review is part of the DOI's broader probe into corruption and violence at Rikers.
The city should pay millions for training on dignity and judgment, the union said.
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