a missing high school student is found dead in the Atlantic Ocean

1985 police find a blood soaked car on a rural road. Missing is the female owner. Days later her body is found floating in a lake.

https://www.tvmaze.com/episodes/203823/swamp-murders-2x01-white-supremacist-killings

Swamp Murders

S2.E1

White Supremacist Killings

Nightmare in Suburbia Season 3, Episode 5, titled "The Undiscovered Body" (also known as the Tati Rodgers case), covers the 2008 disappearance and murder of a 41-year-old Indonesian woman in Wrexham, North Wales