Nation In trial of officers in George Floyd’s death, did they have a ‘duty to intervene’? February 7, 2022 N'dea Yancey-Bragg, USA TODAY Comments Off on In trial of officers in George Floyd’s death, did they have a ‘duty to intervene’? Former officers Thomas Lane, J. Alexander Kueng and Tou Thao didn't stop Derek Chauvin. Experts say training and police culture are to blame.