What is the test for establishing that a supervisor was responsible for the deprivation of a plaintiff?

requirement by showing either (1) the defendant's "personal involvement" in the alleged deprivation or (2) a "sufficient causal connection" between the defendant's conduct as a supervisor and the alleged deprivation. See King v. Cty. of Los Angeles, 885 F.3d 548, 559 (9th Cir. 2018). As for the second method, the plaintiff can establish a causal connection by showing that the defendant "set[] in motion a series of acts by others, or by knowingly refus[ing] to terminate a series of acts by others," which the defendant "knew or reasonably should have known would cause others to inflict a constitutional injury." Id.