Doornbos v. City of Chicago, 868 F.3d 572, 583 (7th Cir. 2017) (“Although some unusual circumstances may justify an officer’s failure to identify himself in rare cases, it is generally not reasonable for a plainclothes officer to fail to identify himself when conducting a stop.”).
Atkinson v. City of Mt. View, Mo., 709 F.3d 1201, 1212 (8th Cir. 2013) (stating that “Sanders had ‘fair warning’ that charging at a non-resisting individual without first identifying himself as a police officer was unconstitutional in the context of an arrest”).
Mattson v. Becker County, Minn., CIV.07-1788ADM/RLE, 2008 WL 3582781, at *8 (D. Minn. Aug. 12, 2008) (“A reasonable officer would clearly know that threatening someone with deadly force and using a taser to restrain that person without first identifying oneself as law enforcement is unlawful.”).