CORRUPTION: Independent Commissioner Against Corruption Bruce Lander delivers a damning report into the Oakden nursing home scandal, declaring it a "shameful chapter in the state's history". (Feb)
MYSTERY: In a renewed search for the Beaumont Children, who disappeared in 1966, police converge on a factory site in Adelaide amid speculation it was where Jane, 9, Arnna, 7, and Grant, 4, were buried. The dig only uncovers animal bones. (Feb)
POLITICS: Liberal leader Steven Marshall ends 16 years of Labor rule in South Australia. His party wins 25 seats in the 47-seat House of Assembly to Labor's 19, with three going to independents. (Mar)
CRIME: Steven Graham Peet is jailed for 36 years for the 2016 murders of his partner Adeline Yvette Wilson-Rigney and her two children, with a judge describing his actions at deplorable and incomprehensible. (April)
TERROR: Zainab Abdirahman-Khalif is found guilty of being a member of terror group Islamic State with evidence against her including 127 video files and communication with three young African women involved in a terror attack in Kenya. (Sept)
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COLD CASE: The disappearance of Colleen Adams 45 years ago is resolved with the discovery of her skeletal remains under a concrete slab at a Yorke Peninsula property and the charging of her husband, Geoffrey Adams, with murder. (Sept)
