[WaffleIronMaker]

It's possible that a Google Alert[1] might be enough for your use case, depending on how well the legal cases are covered by Google.

[1] https://support.google.com/websearch/answer/4815696?hl=en

[beretguy]

Any non Google alternatives out there?

[alwayseasy]

This social listening company does one: https://alerts.talkwalker.com/alerts/

They might try to call and email you though.

[turminal]

Unless Google Alert gets shut down by then.

[doublerabbit]

Or bought to silence any alarms with the terms "Facebook"