Wyo. Stat. § 35-26-103: Limited liability for use of automated external defibrillator.

(a) Any person who uses or attempts to use an automated external defibrillator device on a victim of a perceived medical emergency, any prescribing physician who authorizes the purchase of the AED and any individual who provides training in cardiopulmonary resuscitation (CPR) in the use of an AED shall be immune from civil liability for any harm resulting from the use or attempted use of such device, unless the harm involved was caused by willful or criminal misconduct, gross negligence, reckless misconduct or a conscious, flagrant indifference to the safety of the victim who was harmed.

(b) Any person responsible for the site where the AED is located shall be immune from civil liability for any personal injury that results from any act or omission of acts that do not amount to willful or wanton misconduct or gross negligence if that person complies with the requirements of W.S. 35-26-102.

(c) Any clinical use of the AED shall be reported to the licensed physician.