The Champaign County Sherriff’s Office has been working to solve the murder of Holly Marie Cassano, ever since the 22-year-old woman was stabbed to death in her home near Mahomet in November of 2009. On Friday, investigators received a lead on the unresolved case through the help of a genetic genealogy company which then led to the arrest of Michael F.A. Henslick, 30, on Tuesday evening.