A Kiss Before Dying (1956)

Good-looking college boy Bud Corliss (Robert Wagner) got wealthy coed Dorothy Kingship (Joanne Woodward) pregnant. She won't get her inheritance now, so Wagner murders her, makes it look like a suicide and he appears to have gotten away with it until her sister (Virginia Leith) becomes suspicious.

With Jeffrey Hunter as a pipe-smoking tutor who also helps out his uncle who is chief of police. 

Ends at the Kingship family's massive open pit mine. Bud marvels that the giant trucks cost $50,000 each.

Directed by Gerd Oswald. Scenes tend to be shot in long takes, an early shot lasting three and a half minutes. Based on Ira Levin's first novel.

I was thinking that, with abortion bans and possible future bans on contraception, storylines like this might become plausible again. I'm not sure how DNA testing would affect it. But there was already a remake in 1991 that wasn't well-received.

Available on The Criterion channel. It's being featured with other color films noirs.