Michael and Carmen Ojeda called for justice outside Brooklyn Supreme Court.
They are supporting a bill requiring New York's emergency responders to undergo annual re-certification for CPR.
11-year old Briana Ojeda died last month after being rushed to the hospital.
Her parents say if the officer knew CPR he may have been able to save her life.
The family's attorney says the city should not wait for an internal review to change procedure.
The NYPD suspended Officer Alfonso Mendez without pay pending the investigation.
He could face departmental charges of failing to act, but no criminal charges.