LAWRENCE, Kan. (AP) — A 30-year-old Topeka man will serve at least 20 years in prison for his role in the death of a Lawrence man last year. Archie Robinson was sentenced Thursday to life in prison with no chance of parole for 20 years in the March 2014 shooting death of 39-year-old Patrick Roberts. Prosecutors say Roberts was killed when Robinson and another man burst into his apartment to rob him of money and marijuana. Before he was sentenced, Robinson said he was innocent of the crime. His co-defendant, Dustin Walker, was found guilty in February of aggravated burglary, but the jury could not agree on the first-degree murder charge. His scheduled to be retried on that charge beginning May 4.