She shoots Stroh in self-defense but does not finish him off despite being implored to do so by Rusty Beck. She retires from the LAPD and accepts a new job as the Chief of the District Attorney's Office's Bureau of Investigation.

Is Fritz still married to Brenda in major crimes?

She is still married to Fritz and appears to have remained in Los Angeles rather than taking the Washington, DC job.

What happened to Brenda's husband on The Closer?

Before he fully retires, Fritz aids the LAPD in solving one more case as an FBI agent. At the end of the episode, Fritz suffers a heart attack and has Tao secretly take him to the hospital to be treated, requiring Fritz to wear a pacemaker as shown in “Zoo Story”​​, something that he keeps from Brenda.