Anthony crossed the line when he killed his father even the other members of the family had finally turned on him and the froup he was hanging out with wasn't as loyal as his own family. Harry knew he was a loose cannon and Abby was right he diffinately needed to go. Charles felt the same way especially now with a shoot out with undercover FBI agents killing three of their fellow agents was not a good thing to do. So he and the men he was working for him was put on their most wanted list and pictures posted on the postal service walls at every post office. Harry also heard through his chain of command that every mafia family from Baton Roudge to New York had a put Anthony Moretti and his new gang on the top of their hit list.
Whoever the mole in the Secret Witness Program was Anthony was told the where abouts of Donavan and was going to get his child no matter what it took. Abby was so certain he wouldn't stop at just taking his son and leaving. He would kill Harry, Charles, and herself just for the fun of it. He had killed Crystal and he was suppose to have loved her once. She knew she had to do what she could to keep him safe. That was why they went through all they did down in the marshland of Florida and then the Witness Protection Program. She really hadn't had the time to grieve for her best friend in high school and renewed friend in Florida so to keep her baby safe was a way to keep their friendship then that's exactly what she would do.