He is the head of a highly wealthy, upper-class family in Miami.
Although married, he feels entitled to have affairs with his female employees. He is also the father of Zach Hamilton, with whom it appears he has a distant relationship.
Norma Rivera (the former maid for the Hamilton family) is found bludgeoned to death in her apartment. Since Ed Hamilton was her employer, he is viewed as a suspect. Dexter Morgan accompanies Joey Quinn and Angie Miller to the Hamilton home to question him. The housekeeper leads them through the house and out to the backyard where Ed is working on a laptop by the pool.
When Dexter attempts to collect a DNA swab from Ed, he admits to having an affair with Norma and they had sex shortly before she was murdered. He professes to be innocent because he loved her.
Ed soon begins an affair with another employee, Sofia Fuentes. Meanwhile, his series of affairs have caused Mrs. Hamilton to become depressed and drink heavily. Around this time, Ed sends his son to start seeing Dr. Evelyn Vogel, as Zach seems to have a propensity for violence.
Dexter breaks into Zach’s studio and confirms that Zach killed Norma and appears to be targeting Sofia. However, when he stalks Zach, he discovers that he is planning to kill his father, not Sofia. Ed is saved by the intervention of Dexter who kidnaps Zach for his table. Ed is oblivious to his son's attempt to kill him.
While facing death, Zach admits to killing Norma because he was trying to save his mother from succumbing to alcoholism. Zach thought that if he killed Norma, his father would be faithful to his mother. When he wasn’t, Zach decided to kill him.