Chicago Police Superintendent Garry McCarthy will be on the hot seat Tuesday at a hearing before the City Council, a day after a majority of the council’s Black Caucus made a surprise and sudden call for Mayor Rahm Emanuel to fire him.

At a Monday press conference, many caucus members expressed frustration with McCarthy’s handling of the city’s gun violence that has hit many African-American neighborhoods hard in recent years. According to police department data, the city has seen 359 murders this year (as of Sept. 27).That’s a 21 percent increase over last year. Shooting incidents are also up 21 percent with 1,837 this year so far.

Shooting Incidents, Murder Rate 2015-2014 | Create your own infographics

According to a source close to the caucus, the idea to ask for McCarthy’s ouster came up during a caucus meeting when an alderman offhandedly mentioned it. The idea gained more traction with other aldermen, the source said.

Among the aldermen to ask for McCarthy’s firing were longtime loyalists to Emanuel, notably Ald. Carrie Austin (34th Ward), who chairs the council’s budget committee. Others include Ald. Willie Cochran (20th Ward), who is the vice chair of the council’s public safety committee; and Ald. Michelle Harris (8th Ward), who heads the council’s rules and ethics committee.

But absent was Ald. Will Burns (4th Ward). In a statement, Burns says the Black Caucus meeting was “impromptu” and shortsighted because the police department needs to make structural policy changes that will have a direct impact on the city’s gun violence.

“Like my colleagues, I am frustrated about the increase in shootings and homicides,” Burns said. “But simply changing the leader of an organization is not enough.”

Tonight we’ll hear from a panel of aldermen about what they think of McCarthy’s testimony at City Hall and what changes they want to see at the police department.