AMES, Iowa — The homeless man who pleaded guilty to killing a former Iowa State golfer has told a judge that he's sorry for his crime.

A handwritten letter from Collin Richards, 22, says he wanted to show remorse "for stripping a life from society ... worse from a loving family." The letter was filed Tuesday into court records.

Richards is scheduled to be sentenced Aug. 23 to life in prison. Police say he killed Celia Barquín Arozamena, 22, stabbing her last September while she was playing on a course near the campus in Ames, leaving her body in a pond. Richards had been staying at a homeless encampment in nearby woods.

Barquín Arozamena was a top golfer in Spain as a teenager and came to Iowa State to pursue her career.

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