In Arizona, the state Department of Public Safety manages the AMBER Alert activations and I am not sure what their pay structure is, but I would imagine they have someone in their duty office working 24/7 so it is most likely covered by shift work on normal time at their normal rate of pay. The individual agencies such as Glendale PD where I work, we do have on-call investigators that would be able to respond to a child abduction after hours that could require an AMBER Alert, but I am not sure if that was also what you were referring to. For investigators they receive $40/day for being on-call outside of their duty hours and $60/day for being on-call on their regular days off. That is outside of any overtime they earn for a call-out response. This also is not exclusive or due to AMBER Alerts.