A woman from Pella accused of first degree murder testified Monday (5/10) in her own defense.  Michelle Boat is accused of killing Tracy Mondabaugh of Ottumwa in May of last year.  Mondabaugh was the girlfriend of Boat’s estranged husband.  In her testimony, Boat said she had followed Mondabaugh that day and confronted her.  Boat testified Mondabaugh attacked her…then Boat said she “just snapped”, grabbed a knife and stabbed Mondabaugh.  Closing arguments in Boat’s trial are expected to begin Tuesday morning (5/11) in Knoxville.