In Arizona, to recover punitive damages, a plaintiff must prove by clear and convincing evidence that a "defendant's wrongful conduct was guided by evil motives or wilful or wanton disregard of the interests of others." Piper v. Bear Med. Sys., Inc., 180 Ariz. 170, 180, 883 P.2d 407, 417 (App. 1993); see also Hyatt Regency Phoenix Hotel Co. v. Winston & Strawn, 184 Ariz. 120, 132, 907 P.2d 506, 518 (App. 1995). Punitive damages serve to punish wrongdoers and deter others from engaging in similar conduct. Jacobson v. Superior Court, 154 Ariz. 430, 431, 743 P.2d 410, 411 (App. 1987). To recover punitive damages, a plaintiff must prove something more than the underlying tort. Piper, 180 Ariz. at 180, 883 P.2d at 417. That is, "a plaintiff must prove by clear and convincing evidence that the defendant engaged in aggravated and outrageous conduct with an 'evil mind.'" Hyatt Regency, 184 Ariz. at 132, 907 P.2d at 518 (citing Thompson v. Better-Bilt Aluminum Prods. Co., 171 Ariz. 550, 556-57, 832 P.2d 203, 209-10 (1992), Rawlings v. Apodaca, 151 Ariz. 149, 162, 726 P.2d 565, 578 (1986), and Linthicum v. Nationwide Life Ins. Co., 150 Ariz. 326, 331-32, 723 P.2d 675, 680-81 (1986)). Although the element of a tortfeasor's intent may be inferred, a plaintiff must always prove "outwardly aggravated, outrageous, malicious, or fraudulent conduct." Linthicum, 150 Ariz. at 331, 723 P.2d at 680.