This is a quote from the Milford Daily article previously cited.
"A few minutes later, just after LaPointe had throttled up and the boat was skimming across the surface of the lake, his boat ran up and over the back of Trott's boat. Groetzinger died instantly when she was nearly decapitated by one of LaPointe's propellers, a state medical examiner testified. A propeller severed Trott's lower back and buttocks, and his cause of death was a combination of that injury and drowning."
Here's the cite again for the article.