Nicholas Luerkens has plead guilty to first-degree murder before a motion hearing today. Luerkens is accused of stabbing to death Lynnsey Donald in 2015 in a Hy-Vee parking lot.Luerkens admits to killing Donald and says he understands the penalty for first-degree murder is life without parole.Judge Mitchell Turner is going over the plea, and informing Luerkens of the rights he is giving up by pleading guilty.This is a developing story.