Peter Seaford was attacked between 4 and 4.45am on 12 March 1989 at Whyalla.

An hour earlier he had his Essington Lewis Ave unit when an alarm was triggered by a break-in at his service station, which was just 500 metres away.

When he arrived at the business alone he found a car engine part had been used to smash the front door, and rang his partner and asked her to bring the keys to him so he could turn the alarm off.

At that point he became concerned about cash he had left at home and returned there for a short time before going back to the service station.

He returned home a short time later, after police told him that a neighbouring unit had also been broken into. When he arrived home again it is believed that he disturbed his killers.

Despite serious injuries he called the service station, which was answered by his partner, who returned to the unit and found Peter with serious head injuries.

The unit had been ransacked and he had suffered extensive injuries to both arms when defending himself during the violent attack.

Peter died several hours later in hospital from multiple blows to his head inflicted by a heavy blunt object. There is unmatched DNA recovered from this scene.

While Mr Seaford’s attackers stole the business takings, between $500 and $1,000, they missed other cash hidden in the unit.

Based on information from neigbours, investigators believe more than one person was involved.

Investigators believe details of a ‘unique’ phone call received in 2006 could help them solve this cold case murder. That person contacted a random person and asked them to provide the information to police. The person who received the call did so, and police believe the instigator called back to make sure the information had been passed on.

A second call was received when a person contacted Crime Stoppers via the website on 17 February and provided information that suggested they had knowledge about the murder.

A reward of up to $200,000 remains on offer for information that leads to a conviction in this case.

If you have any information, please call 1800 333 000 or make a report at www.crimestopperssa.com.au

You can remain anonymous – it’s about what you know, not who you are.