CCTV footage of alleged shooter Julian Ingram attending a police station hours before three people were found dead in a town NSW’s central west has been released by police.

The footage comes as the search for the alleged Lake Cargelligo gunman nears one week.

Police have today revealed they believe the 37-year-old is still alive and possibly being assisted by someone.

NSW Police Commissioner Mal Lanyon said high heat in the area meant police were actively searching for Ingram “in the most extraordinary conditions”.

“This is the fifth day of over 40-degree temperatures, yet our police have been unwavering.”

Police have been searching properties and public land, scouring an area the size of metropolitan Sydney, in the seven days since the shooting.

Assistant Commissioner Andrew Holland said members of the public had been “very forthcoming with their information” following one confirmed sighting of the alleged offender at Mount Hope earlier this week.

“We believe that [Ingram] is still alive,” Holland said.

NSW Police Commissioner Mal Lanyon gives an update as the hunt in Lake Cargelligo.© Nine

“Our plan is to track him down and bring him forth before the courts.”

Holland said Ingram’s experience in the Lake Cargelligo area and in areas around Mount Hope while working with the council could be helping him evade police.

“He’s aware where the water sources are, he’s aware where the hidey holes are, such as caves.”

Holland said that officers from the public order and riot squad are set to join the search this weekend.