WILLMAR, Minn. (AP) - The attorney for a Willmar teenager accused of planning his grandmother's murder says the teen has reached a plea deal.

Defense attorney Daniel Mohs says that 18-year-old Robert Warwick will plead guilty next week to first-degree murder while committing a felony.

Mohs says the other charge - first-degree premeditated murder - will be dropped.

Warwick's jury trial was set to start next month.
Prosecutors say Warwick hatched the plan to rob and murder his grandmother, 79-year-old church volunteer Lila Warwick, in her Willmar home last summer.

Robert Warwick's friend, Brok Junkermeier, now 20, pleaded guilty at his trial in April to killing the woman and was sentenced to life in prison without parole.

A third teen pleaded guilty for acting as a lookout.