True crime has become such a staple in American media consumption that there's now a whole channel dedicated to it. Investigation Discovery (ID) airs investigative documentaries like On the Case with Paula Zahn, Disappeared, CBS' 48 Hours, and NBC's Dateline.
You can watch Investigation Discovery (ID) on Sling TV Orange, Philo, Sling TV Blue, DirecTV Stream, or YouTube TV.
The cheapest option to watch Investigation Discovery (ID) is Philo for $28/month.