The height of arrogance

Officer.com

The head of London's police force said he considered resigning over the police shooting of a Brazilian electrician mistaken for a terror suspect, but insisted he had no plans to quit, according to comments released Sunday.

As I type, there seems to be nothing to add on the inquiry. What has happened to the officers. The only information I could find was one small sentence in a recen Independent article saying the officers were prosecuted pending the result of the investigation. Meanwhile a whistleblower was suspended. Is that also pending the result of an investigation? I doubt it.
If anyone has any further information, please let me know.