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In this April 29, 2012 photograph, a law enforcement officer walks to a car outside Dr. Arnold Smith's Grand Boulevard home in Greenwood, Miss. (AP)
Police Chief Henry Purnell tells The Greenwood Commonwealth that 22-year-old Cordarious Robinson has been linked to the case, but provided no details.
Bond for Robinson was set Wednesday at $120,000 on conspiracy and gun charges. Dr. Ralph Arnold Smith Jr. is charged with of hiring men to kill his ex-wife's divorce lawyer. Paul Muller and Derrick Lacy also are charged in the case.
Authorities say Lacy and Keaira Byrd went to Lee Abraham's office to kill him Saturday. Byrd was killed in a shootout with investigators. Lacy was wounded.
It's not clear what alleged role Robinson and Muller had.