A man was arrested at a train station last week in relation to a sexual assault that occurred three years ago.
Police have arrested a second man after methamphetamine was found hidden inside a car in Mount Osmond on 13 July.
World War I and II medals stolen from Royal Park have been found and handed in to police.
Port Augusta Police are investigating a suspicious shed fire overnight.
New DNA testing techniques have provided police with a potential profile for a suspect connected with the murder of 36-year-old Robert Mark Woodland in 2004, investigators have revealed.