'Other parties' suspected of involvement in pair's disappearance
Police have conducted several searches in the Wonnangatta Valley over the past year, and information led police to examine the Great Alpine Road between Mt Hotham and Harrietville on Wednesday.
Shovels were recovered on the roadside but it's unclear if the tools had any links to the disappearance.
Detective Acting Inspector Cambridge said it was possible something had been flung from a vehicle.
He said there wasn't information to suggest the missing pair had been seen at Mt Hotham.
Police have previously asked for assistance to find Mr Hill's missing drone.
A large amount of information has been passed on to investigators, who are keen to speak to people who were around Mt Hotham about the time the couple went missing.
"I think the most likely scenario is still the scenario that there's other parties involved in this," Detective Acting Inspector Cambridge said.
"I think every time the families hear from us, they keenly feel that little flicker of hope that maybe they're going to get some news.
"I think it probably goes without saying, the fact I'm here today shows this is a fairly significant piece of information we're acting on."
He urged people to call Crime Stoppers.