A $250,000 reward has been offered for information leading to the arrest of accused triple murderer Julian Ingram.

The 37-year-old is still on the run after an alleged domestic violence-related killing spree at Lake Cargelligo in central-west NSW on January 22.

Ingram allegedly fatally shot three people, including his pregnant former partner Sophie Quinn and her aunt Nerida Quinn, hours after he visited a police station.

Ingram, a council worker, was last seen driving a Ford Ranger ute with an emergency light bar on the roof.

In a bid to crack the case, the NSW government has put up the $250,000 reward. NSW Police Deputy Commissioner Paul Pisanos said police needed urgent help from the community to ensure no stone was left unturned.

“This is about bringing a resolution to the families and all those affected,” he said.

“NSW Police is unrelenting in our quest to apprehend Ingram, but we need the community to come forward with any information that could assist.”

In February, Assistant Police Commissioner Andrew Holland said he believed some people were helping Ingram

He previously warned that police would arrest and prosecute anyone helping the alleged murderer access food and water across the outback region.

“To anyone who is aware of his whereabouts – let this reward be the prompt for you to break your silence and assist police,” Holland said.

NSW Police and Counter-terrorism Minister Yasmin Catley said even the smallest piece of information could help police find Ingram.

“If you know anything about his whereabouts, now is the time to speak up,” she said.

Police previously said Ingram had access to a vehicle but were unsure if he had abandoned his getaway ute.

An earlier tip-off led investigators to focus on the areas surrounding the remote outpost of Mount Hope, a former mining town about 90 kilometres north-west of Lake Cargelligo.

Two women claimed they came face-to-face with the alleged killer, saying he pointed a gun at them near Mount Hope.

An almost one-minute CCTV clip released by police showed Ingram sporting a red cap and blue and yellow work gear while casually vaping outside Lake Cargelligo police station on January 22.

He is described as being of Aboriginal/Torres Strait Islander appearance, about 165-170 centimetres tall and of a medium build with short dark hair and brown eyes.

-AAP