Olivia, under stress is being taken care of by Elliot, her executor of trusts and the man who has always showed interest in her.
Howard explains everything, how Elliot is his uncle and has helped him this whole time. He also said that they killed Mack ten years ago but kept calling so nobody would look for him. Elliot spent all the money from Mack's trust fund and couldn't give it to Mack when he asked for it. Mack got suspicious and realized something was going on. Elliot killed him and covered it up. Howard then explains that the building they are in will be knocked down in a few minutes, but the investigators show up and stop it. Then Howard jumps up and down until the rickety building finally falls and jumps under all the falling debris. The police get in quickly to save Carolyn and Leesey. They had already apprehended Elliot.
Mack became a suspect after his former favorite teacher was killed and someone stole her tapes of meetings with Mack. Carolyn went to talk to his ex-girlfriend to find out more information, she found that Mack had a child with this woman.
Yeah, he's Mack's.
Someone left Carolyn a note telling her to meet with Elliot at a corner and that Mack would be there, but when she got there Howard Altman over-powered her and pushed her down a flight of stairs knocking her unconscious. When she woke up, she was next to Leesey Andrews.
We got a match!
The investigators figured it out, by looking at all the pictures related to every case, they found a familiar face that showed up often.
Carolyn and her mom are finally at peace knowing what happened. Carolyn and Nick get together and try to start a family, their first child will be a boy, his name will be Mack.