Why didn't anyone try to get justice for the murder of Elia Martell and her children from the rebel side who had honorable people like Jon Arryn and Hoster Tully ?
And How did Tywin Lannister get away with this? Murdering members of a great house and innocent children and presenting them rapped around the colors of his house? Doesn't this set a bad precedent for the future baratheon dynasty eg if the targaryen return to power than they may not spare innocent baratheon women and children?
Why didn't the rebels side leaders like Jon Arryn atleast try to put Tywin for trial for this?