Mervyn and Maree Schwarz, 71 and 59, and Maree’s son Graham Tighe, 35, were allegedly murdered in North Queensland. Mervyn and Maree Schwarz, 71 and 59, and Maree’s son Graham Tighe, 35, were allegedly murdered in North Queensland. Credit: 7NEWSA grazier on trial for murder allegedly said “I’ll end this once and for all” before opening fire on his neighbours, whom he had accused of stealing cattle. North Queensland farmer Darryl Valroy Young allegedly shot dead Mervyn and Maree Schwarz, 71 and 59, and Maree’s son Graham Tighe, 35, at a property in Bogie, near Bowen, on August 4, 2022. Camera Icon Accused gunman Darryl Young is on trial charged with three counts of murder and one count of attempted murder.