A New York man charged in a fatal May 2009 drug robbery and shooting at Harvard was sentenced Monday to 18 to 20 years in state prison on a manslaughter charge and four to five years in state prison on a charge of willfully misleading a grand jury.

Jason Aquino, 21, of Manhattan, N.Y., pleaded guilty March 24 in Middlesex Superior Court to a plot to rob Justin Cosby, 21, of Cambridge. Cosby was on campus to sell marijuana, police say. Aquino and two other New York men were on campus through an invitation by a Harvard student who is also accused in the plot.

“On behalf of Justin, his mother and sister, his entire family and circle of friends, we continue to hold all those accountable,” Middlesex District Attorney Gerry Leone said. “Our efforts continue as we turn our attention to the sentencing of Blayn Jiggetts and the trial of Brittany Smith.”

Jiggetts has pleaded guilty to charges of manslaughter, armed robbery and possession of a firearm. His sentencing date has not been set. Smith, the Harvard student, has been indicted on charges of illegal possession of a firearm, accessory after the fact to murder, willfully misleading a grand jury and willfully misleading a police officer. Jabrai Jordan Copney was found guilty on murder charges April 22.

More information on the case is here.

This post was written from a press release.