Does anyone else think it could be a mistake long term having had Kylie kill Callum? I think her and David with the kids are great as a family unit for the future of the show and with the inevitable secrecy and police investigating and all to follow, I think it could be bad for the character long term.

Another drawn out court case

If there was some way they could frame Tracey for it it would be handy.
But yes I think something like this will always haunt the characters if not now then later. It could work out well for a big reveal when Max is a teenager if he's still in the show.

She will be on a life line now
Counting down till she is caught

That doesn't mean she will have to leave though as Tracy Barlow killed Charlie and she is still in it and in Eastenders they have loads of criminals Ronnie Mitchell, Stacey Branning, Ben Mitchell, Bobby Beale, Dean Wicks. If Paula Lane has another baby i'm guessing they will probably just write it so she is in prison