Ask HN: Chicago area Amber Alert system gone haywire?

My family and my friends have each received the same amber alert more than 5 times in the last 48 hours. This has happened with multiple carriers and multiple device brands.

Local news reported the subject of this alert was recovered uninjured more than 36 hours ago, but the alerts persist at random intervals. I and many others have had to disable the alerts entirely, which is basically a permanent reduction in the effectiveness of the system.

Clearly some sort of queueing system has gone awry. Does anybody know the infrastructure for amber alerts? Who runs this system?