Teen Killer Courtney Schulhoff & Other Stories

 Courtney Schulhoff and Michael Morin had spent the previous day like any other teenage couple, watching a double-bill movie at the local cinema. Courtney, sixteen at the time, had been dating twenty-year-old Michael Morin for about a year, and their story was nothing like a typical teenage romance story.
When they finally got to the home of Stephen Schulhoff, Courtney's dad, in Altamonte Springs, Florida, what happened next is still somewhat a mystery. The only concrete part of the story is that, in the early morning of February 10th, 2004, Stephen Schulhoff lost his life after a brutal attack while he was still asleep in his bed.

Who murdered Stephen Schulhoff?