CEDAR RAPIDS — Closing arguments in the Nicholas Luerkens murder trial are set to begin at 11 a.m. today in Linn County District Court. Luerkens, 33, of Cedar Rapids, is accused of killing former girlfriend Lynnsey Donald, 29, in the parking lot of the Marion Hy-Vee on April 21. According to testimony Tuesday, Luerkens planned and started following Donald after she broke up with him and wouldn’t reconcile.