A judge in Milwaukee has sentenced a 21-year-old woman to 20 years in prison for helping a new boyfriend kidnap and kill a college student for his car.

Tammi LaFave pleaded guilty in March to a charge of felony murder.

The case involved 31-year-old Haroon Khan, who thought he was going to show his 2006 Mitsubishi Lancer Evolution to potential buyers last October.

According to the criminal complaint, LaFave and her 20-year-old boyfriend, Travis Zoellick, met Khan in Milwaukee. LaFave was from Delafield, Wis., and Zoellick was from Watertown.

Officials said Zoellick pulled a gun on Khan, drove him to a wooded area near Watertown and stabbed him to death.

Zoellick killed himself when police approached his home.