The Karen Read fallout continues — and its ripple effects are spreading beyond Canton into Boston City Hall.

Read’s attorney in a blistering letter to Mayor Michelle Wu is slamming Boston Police Commissioner Michael Cox for being “caught in a lie” about ex-cop Kelly Dever, a controversial witness in the murder trial.

Read’s lawyer Alan Jackson in the bombshell missive to Wu is calling for Cox to be placed on the Suffolk DA’s list of officers with credibility issues — known as the Brady list.

Also, Jackson in the letter to the Massachusetts Peace Officer Standards and Training (POST) Commission, wants the POST Commission to launch a disciplinary investigation into Cox.

“This is not a political issue. It is a question of credibility and public trust,” Jackson wrote in Monday’s letter. “W

See Full Page