OMAHA, Neb. (AP) — It was a mystery that many thought might never be solved: Who savagely stabbed to death the 11-year-old son of two medical doctors and the family’s housekeeper in 2008 in one of Omaha’s most affluent neighborhoods?

More than eight years later, a former doctor is standing trial for those deaths, as well as the 2013 killings of another Omaha doctor and his wife. Prosecutors say the crimes were motivated by Anthony Garcia’s long-simmering rage over his 2001 firing from a Creighton University School of Medicine residency program.

The case has been marked not only by the brutality of the crimes, but courtroom sparring that has seen one Chicago defense attorney kicked off the case and prosecutors having to defend themselves from accusations of misconduct.

Opening statements are expected Monday.