THE 1975 suspected murder of Maryborough's Terry Floyd is one of 30 homicides identified by Victoria Police's cold case unit as highly solvable.
Homicide Squad cold case unit head Senior Sergeant Ron Iddles said they had set a target to review 25 unsolved murders annually.
The unit will look at whether DNA exists or could be obtained, if all the exhibits still exist, whether relationships between people who provided alibis have changed and whether any new evidence has come to light.
Terry, 12, disappeared from the intersection of the Pyrenees and Sunraysia highways on June 28,1975 while hitchhiking.
A convicted paedophile has admitted being on the Pyrenees Highway at the time Terry disappeared.
Police are also seeking information on a HK cream panel van that was last seen in Ballarat and may have been used to abduct Terry.
The van is now believed to be painted orange and was traded at Braybrook Car Sales on September 4, 1979.
Terry's younger brother Daryl has spent hundreds of thousands of dollars searching the Morning Star Mine at Avoca for his brother's body.
In December, the shaft was at a depth of 52 metres, with a red Millers shirt already found that Daryl believes belonged to Terry.
Among the other murders believed solvable are are the rape and murder of Wallan 12-year-old schoolgirl Denise McGregor in 1978 as she returned home from a local milkbar and the death of factory worker and single mother Annette Steward in her Geelong West bedroom in 1982.