Richard Allen was convicted in November in the killings of 13-year-old Abigail Williams and 14-year-old Liberty German.
Carroll County High School rolled out a new transportation and logistics learning pathway called CATALYST.
Police said in an update Saturday afternoon that the fourth victim had been located and all recovery efforts have ended.
Fifty-two-year-old Richard Allen is charged in the killings of 13-year-old Abigail Williams and 14-year-old Liberty German. He was arrested in October 2022.
A young girl believed to be around 3 years old was rescued from the home and taken to the hospital.
KSP said Osborn is believed to have connections to Carroll and Barren counties.
KSP said a grand jury declined to file charges against the person who shot and killed Daniel Shouse, 63, on June 8 in Carroll County.
Residents in Spencer County, Cumberland County, Monroe County, Carroll County, and Bullitt County are now offered free memberships.
Investigators now say the driver who died also had a gun.
An initial investigation revealed two cars were driving on Interstate 71 and got off exit 43, KY 389.