ST. LOUIS, Mo. (KMOX) — St. Louis' top prosecutor issues a statement, signaling an effort to improve her working relationship with the police department.

The letter from Circuit Attorney Kim Gardner says she's reached a new understanding with police to communicate and cooperate more on gathering evidence at crime scenes and deciding which officers will be excluded from testifying in court because of credibility issues.

However, Jeff Roorda of the St. Louis Police Officers Association isn't buying it and echoed a statement made by St. Louis Police Chief John Hayden last week.

Related: Police Chief Jon Hayden Responds to Kim Gardner's Obstruction Accusations

"She's irredeemable," he bluntly told KMOX's Kevin Killeen. "She should move on to a job she can do well. I don't know what it is, but it's not prosecuting criminals."

He says Gardner may have satisfied some administrative types in the department, but what about the officers on the streets?

"The road dogs, the people that are out there doing the job every day, have zero confidence in her. These parlor tricks are not going to improve the relationship."

Gardner turned down a request for comment, but Adolphus Pruitt of the NAACP St. Louis went to bat for her, saying his confidence level in Kim Gardner is "extremely high."

"The prosecutor has to run for election some 18 months from now, well hell, let's wait until election time," Pruitt said in response to Roorda's attacks. "In the meantime, people need to calm down and let the prosecutor do her job."

As for Hayden, he issued a new statement saying he looks forward to better communication with her.