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Age: 55. Born in Paris and moved with his family in the early 1950s to Dayton, Ohio.
Residence: SoHo loft in Manhattan, two homes in the Hamptons, on Long Island.
Career: Scientist and researcher, with a doctorate in immunobiology. Undergraduate and graduate degrees from Ohio State University.
From 1977 to 1985, held research positions at Stanford University Medical School, Mount Sinai School of Medicine and Tufts University School of Medicine.
Started a now-defunct Web venture, ibeauty.com, with several investors. Sams, a restaurant he co-owned with movie producer Stephen Crisman and Crismans wife, the actress Mariel Hemingway, went bankrupt in 1993.
ImClone legacy: Founded company in 1986, rescuing it from possible bankruptcy with $6 million from billionaire investor Carl C. Icahn.
In 2001, Bristol-Myers Squibb Co. committed $2 billion for 19.9 percent of the company and a piece of the Erbitux profits.
In December 2001, Federal Drug Administration rejects application for cancer drug Erbitux.
ImClone investigation: May 2002, steps down as chief executive. Arrest in June on insider-trading and related charges; takes Fifth Amendment before congressional committee hearing investigation of ImClone.
Indicted in August, pleading innocent. Pleads guilty Oct. 15 to charges of securities fraud, bank fraud, conspiracy to obstruct justice, and perjury.
Hobbies: A $20 million art collection.
Civic activities: Raised money for Hillary Rodham Clintons Democratic Senate campaign. Served as chairman of the New York Council for the Humanities.
Personal: Divorced, with two adult children.
Friends: Revlon chief executive Ron Perelman, home-decorating doyenne Martha Stewart, Mick Jagger, Mariel Hemingway, actress Virginia Madsen and art dealer Larry Gagosian.