The last of three men charged in a 2009 Santa Fe home invasion has been sentenced to six years in prison.

Police say the burglary occurred four days before the same three men were involved in the slaying of a St. Michael's High School graduate in a similar home invasion in Albuquerque, a crime in which all face charges.

Police have said both burglaries were tied to drugs.

Luis Martinez, 24, pleaded guilty Tuesday in state District Court to one count of conspiracy and one felony count of armed robbery of Gary Roybal in his Ambrosio Street home on July 6, 2009.

In that home invasion, Martinez and two other men — Daniel Borrego and Benjamin Lovro, who have already pleaded guilty to various charges in the Santa Fe case — tied Roybal up with duct tape and electrical cords while ransacking his home.

Roybal said he is still traumatized from the incident, and his grandchildren remain afraid to visit his home.

Martinez already has a lengthy criminal history, with juvenile offenses and at least two felony convictions as an adult. While his defense attorney pointed to a troubled upbringing as the cause of his problems, State District Judge Michael Vigil said enough was enough.

"I have a lot of people come before me who have less than favorable childhoods," Vigil said. "But at some point in time, you as a young man needed to make some changes in your life."

Vigil sentenced Martinez to serve six years in prison for the Santa Fe case. While Martinez will get credit for about one year of time already served in prison in Hobbs, he won't be able to serve the remaining five years on Tuesday's conviction until 2015, when his sentence for other unrelated convictions is completed.

He will then have to serve a minimum of 85 percent, even with good behavior, of the five remaining years on his sentence because the home invasion qualified as a serious violent offense.

In exchange for Martinez's guilty plea Tuesday, Assistant District Attorney Orlando Torrez said the state agreed to drop charges of aggravated burglary and false imprisonment.

Martinez and Lovro both still face murder charges, and Borrego faces various other charges related to the killing of 21-year-old Kerry Lewis.

The St. Michael's graduate and University of New Mexico engineering student was killed in an invasion of his Albuquerque home on July 10, 2009.

Lovro and Martinez face an open count of murder, kidnapping, aggravated burglary, robbery, tampering with evidence and four counts of conspiracy. Borrego faces conspiracy, aggravated burglary and robbery charges.

The charges related to Lewis' death are being handled in Albuquerque. Trial dates for those charges have not yet been set for any of the three defendants.

Contact Geoff Grammer at 986-3076 or ggrammer@sfnewmexican.com.