I agree that it was all too easy for Gray to get away with killing Chantelle and Kush (no CCTV
yeah right)
We have no idea what he did with Tina and if she'll ever be found.
Apparently he sent Laura some nasty texts and he's shouted at Whitney. Chelsea has seen his temper too and she's still marrying him. Gray is just a misogynist with a quick temper to the world. Personally I think Whitney looks ridiculous trying to break them up.
It would be different if she actually had some evidence that he's a murderer but she has nothing.