PHOENIX – Dozens of people, mostly African Americans, huddled around tables scattered across a church gymnasium on a recent evening, discussing past run-ins with Phoenix police officers and ways to hold them accountable. In a city still stinging from a video of officers pointing guns and cursing at a black family this summer, the confidential talks intended to give officials in the country’s fifth-largest city ideas on how residents could help oversee the police. “I want to see, hear, feel and touch what you are coming up with so we can make real change,” said Police Chief Jeri Williams, wearing a casual civilian shirt and slacks to the gathering at the church.