NEW YORK (CBSNewYork/AP) — A New York City man admitted Tuesday he killed an 83-year-old nun in a Harlem car crash while he was fleeing police after a series of stickups.

Dyson Williams, 22, pleaded guilty to murder, robbery and other charges in a Manhattan court. Williams is expected to get 17 years to life in prison at his May 30 sentencing.

Prosecutors said Williams and 20-year-old William Robbins committed a string of armed robberies on June 22, 2010.

Authorities said Williams was behind the wheel of the getaway car when it slammed into a minivan while Sister Mary Celine Graham walked on the street.

CBS 2’s Pablo Guzman spoke with Sister Loretta Theresa, a close friend of Sister Mary, who described how she felt when she heard he friend had died.

“I just fell down into the chair. It was too much of a shock,” she said, adding she was praying for the two young accused men.

Graham was killed in the collision. Four other people were hurt.

Robbins’ case is still open. He’s due back in court next week.

(TM and Copyright 2012 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2012 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)

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