Police believe Julian Ingram is still alive as the manhunt continues one week on.

New footage has been released showing alleged triple murderer Julian Ingram at a police station on the day of the shooting in NSW’s Central West.

The 37-year-old is accused of shooting dead his pregnant ex-partner Sophie Quinn, 25, her friend John Harris, 32, and her aunty Nerida Quinn, 50, in Lake Cargelligo last Thursday.

Ingram, who police say is also known as Julian Pierpoint, attended a police station on the same day, with the visit captured on CCTV.

The footage shows him wearing a yellow and navy high-visibility shirt, navy cargo pants, black boots and a red cap.

Additional images of Ingram have also been released including a close-up photo of tattoos on his arm.

Police say they believe Ingram is still alive as the manhunt continues one week on.

Officers believe Ingram’s local knowledge may be helping him survive scorching temperatures of more than 40C that the region has endured for the past five days.

“The experience that he has as a local in the area… he’s worked for the council, he’s worked in those areas out towards Mt Hope in that area, he’s aware where the water sources are, he’s aware where the hidey-holes are, such as caves,” Assistant Commissioner Andrew Holland said on Thursday.

Holland said police would be “confident to say” Ingram may be receiving help from people in the community, given his need for food and water in the extreme heat.

He confirmed there had been one reported sighting of Ingram at Mount Hope, with other reported sightings still being investigated.

“We’ve spoken to the witnesses, and (based on) what they tell us at this point, we believe it may have been him, but again, it’s yet to be confirmed officially, but we’re in that area,” he said.

Holland said the vast search area — spanning about 40,000 acres — was contributing to the difficulty in locating Ingram or his ute.

Police on Tuesday released additional images of a white dual-cab Ford Ranger ute with NSW registration DM07GZ.

More than 100 police officers are involved in the search, with 10 additional officers from the riot squad brought in to assist.

“The search will continue indefinitely until we find someone,” Holland said.

“All members of the community, and especially the Mount Hope area as well, should exercise extreme caution.

“They need to be aware that there is a gunman on the loose in that area.”

Anyone who sees Ingram or the vehicle has been urged not to approach him and to contact emergency services immediately.

Police allege Ingram fatally shot Quinn and Harris while they were inside Quinn’s black Suzuki Swift on Bokhara St about 4.30pm last Thursday.

A short time later, police said he drove just a few minutes to Walker St and allegedly opened fire in the driveway, killing Nerida and seriously injuring 19-year-old Kaleb MacQueen, a friend of her son.

MacQueen, the sole survivor of the shooting, told 7NEWS Ingram was allegedly laughing as he fired the shots.

“I heard boom, boom. She was, yeah, holding her neck and then he was laughing.” he said.

Vincent Hurley, a 30-year police veteran and criminology academic, told AAP the targeted nature of Ingram’s alleged killings should lessen the threat of more violence.

“The community could feel slightly reassured that he’s not after a random individual,” Hurley said.

“It’s feasible that (the search) could be six weeks.

“I doubt whether he would survive out there for six weeks.”

If you or someone you know is impacted by sexual assault, domestic or family violence, call 1800RESPECT on 1800 737 732 or visit 1800RESPECT.org.au.

In an emergency, call 000.

Advice and counselling for men concerned about their use of family violence: Men’s Referral Service, 1300 766 491.

If you, or someone you know, are feeling worried or no good, you can connect with 13YARN on 13 92 76 (24 hours/7 days) and talk with an Aboriginal or Torres Strait Islander Crisis Supporter.