Killers who refuse to tell South Australian police what happened to their victims will remain in jail under a proposed "no body, no parole" rule.
Correctional Services minister Tony Piccolo said the changes would give life-sentenced prisoners an incentive to co-operate with authorities and bring closure to victims' families.
"I could not think of anything more awful than to have a loved-one missing, whilst their killer serves time in prison," Mr Piccolo said.
Life-sentenced prisoners will also remain on "parole for life" under the proposed changes, meaning an indiscretion could see them return to jail.
Mr Piccolo said the parole board would also have the power to order a prisoner on parole to be monitored by GPS.
"This would give peace of mind to victim's families as often parole conditions forbid the offender from entering particular suburbs or areas of the state," he said.
The minister said the proposed changes would be introduced to parliament as soon as possible.
