I was really impressed and watched almost whole show in one sitting, if I didn't have to go sleep, good acting, nice music, thrilling captivating plot, not overly long episode runtime, shame they fucked it up with overly complicated ending, the obvious suspects were:

1. her own angry jealous son who was there and she didn't want him in her life
2. her accused lover Rusty
3. Tommy the colleague she disliked although he liked her
4. Rusty's son trying to save his family who was there on bike

Sadly they decided to go with overly complicated twist ending, first him accusing own wife as 1st twist (+covering for her) and then his daughter admitting she done it as 2nd twist. I mean after this ending I'd be probably happier, if they left open ending without serving the killer on the silver plate.

Btw. bold ending to rule out 3/4 white main male suspects and end up with black female killer, overal quite nice non-woke TV show (besides the new hispanic homo DA, where it's only hinted).