Given the following context:

Seconds is a mystery dealing with the obsession with eternal youth and a mysterious organization which gives people a second chance in life.
Arthur Hamilton is a middle-aged man whose life has lost purpose. He has achieved success, but finds it unfulfilling.  His love for his wife has dwindled and he seldom sees his only child.  Through a friend, Charlie, whom he thought was dead, Hamilton is approached by a secret organization, known simply as the "Company", which offers him a new life.
Hamilton arrives at a meat-packing plant for a meeting.  He is given workman overalls and hat, then exits the facility by a different door and is seated inside a truck that takes him to another building.  He disappears into a large complex filled with dark, empty hallways, where he awaits his transformation. The Company gives Hamilton the body of a young man through plastic surgery, and a new identity, namely "Antiochus 'Tony' Wilson".  He later discovers this identity has been taken from someone who recently died.

answer the following question:

What is the last name of the person who thought his friend was dead? 

Hamilton