Suspect number four: Gail Platt
Being a mother to David requires serious patience and when it comes to her son, Gail seems to be a saint. As everyone around his regards him as sly and untrustworthy, Gail gives him all the second chances he needs.
Let's not forget he threw her down the stairs, almost killing her, when he discovered she'd helped his girlfriend Tina organise an abortion.
Has Gail finally had enough of her youngest son?