claimed compensatory damages for loss of income, loss of reputation, mortification, embarrassment, humiliation, degradation, and anxiety and mental anguish, and he also sought punitive damages. The defendants collectively moved for summary judgment on all claims. The district court granted the motion on July 14, 2008. Vereecke timely appealed.
II.
We review de novo a district court’s grant of summary judgment. Williams v. Mehra, 186 F.3d 685, 689 (6th Cir.1999) (en banc). Summary judgment is proper “if the pleadings, the discovery and disclosure materials on file, and any affidavits show that there is no genuine issue as to any material fact and that the movant is entitled to a judgment as a matter of law.” Fed.R.Civ.P. 56(c). The Court must review all the evidence, facts, and inferences in the light most favorable to the nonmoving party. Matsushita Elec. Indus. Co. v. Zenith Radio Corp., 475 U.S. 574, 587, 106 S.Ct. 1348, 89 L.Ed.2d 538 (1986).
In order to defeat a summary judgment motion, the nonmoving party “must show sufficient evidence to create a genuine issue of material fact.” Prebilich-Holland v. Gaylord Entm’t Co., 297 F.3d 438, 442 (6th Cir.2002). The nonmoving party must present evidence sufficient to permit a reasonable jury to find in its favor. Anderson v. Liberty Lobby, Inc., 477 U.S. 242, 252, 106 S.Ct. 2505, 91 L.Ed.2d 202 (1986). Entry of summary judgment is appropriate “against a party who fails to make a showing sufficient to establish the existence of an element essential to that party’s case, and on which that party will bear the burden of proof at trial.” Celotex Corp. v. Catrett, 477 U.S. 317, 322, 106 S.Ct. 2548, 91 L.Ed.2d 265 (1986).
III.
A.
In order to establish a prima facie claim of First Amendment retaliation, Vereecke must demonstrate that:
(1) he engaged in constitutionally protected speech or conduct; (2) an adverse action was taken against him that would deter a person of ordinary firmness from continuing to engage in that conduct; and (3) there is a causal connection between elements one and two— that is, the adverse action was motivated at least in part by his protected conduct.
Scarbrough v. Morgan County Bd. of Educ., 470 F.3d 250, 255 (6th Cir.2006) (citing Thaddeus-X v. Blatter, 175 F.3d 378, 394 (6th Cir.1999) (en bane)). We assume without deciding that Vereecke’s lawsuit on behalf of his daughter qualifies as protected speech. See id. (outlining our two-part test, which requires findings that the speech was of public concern and that the employee’s free-speech interests outweighed the efficiency interests of the employer). Further, with respect to the second element, we assume without deciding that the reprimands, Vereecke’s removal from the position of athletic coordinator, and the police investigation instigated by Krystyniak were adverse, if not independently then at least in the aggregate. Cf. Lahar v. Oakland County, 304 Fed.Appx. 354, 357, 358-59 (6th Cir.2008) (per curiam) (aggregating of all the employer’s actions and analyzing whether they “r[o]se to the level of adverse-employment action”). We now turn to the third element of a retaliation claim.
The third element of a First Amendment retaliation claim requires the plaintiff to prove “a causal connection between the protected conduct and the adverse action.” Thaddeus-X, 175 F.3d at 399. When assessing motive in the context of a sum