He said he believed the jury was "under tremendous pressure to 'make it right' for George Floyd.".
The former officer spoke on the condition of anonymity, but his identity is known to Insider.
He worked for the Minneapolis Police Department for nearly three decades before quitting days before Chauvin's trial began.
Insider spoke with him less than 24 hours after a jury found his former colleague guilty on murder and manslaughter charges in the May 2020 killing of George Floyd.
The former officer said the jury finding Chauvin guilty on all three charges was "not at all" what he expected, and called it a "tragedy.".
People at the site of George Floyd's death react to the news of Chauvin's guilty verdict on April 20.
The former officer said he was especially shocked at how quickly the jury deliberated — just over 10 hours — before delivering the guilty verdict. »