Daniel Morgan, a young private investigator, was murdered in a carpark in 1987. His killer has never been brought to justice.
Three and a half decades on the Met Police have discovered a "locked file of documents" that were never handed over to the inquiry looking into police failures.
Today on The News Agents we ask London Mayor his response to what just happened, whether the police should be trusted with new powers and whether corruption lies at the heart of what went wrong.
We also take you to the car crash debate of the last 24 hours. For the first time since 2016, CNN decided to give Donald Trump a live town hall forum with a studio audience... the day after a jury found him liable for sex abuse.