There's an increased police presence in Otorohanga as the man wanted in connection with the fatal stabbing of a 60-year-old grandmother remains at large.
Ross Douglas Bremner, 34, is wanted in relation to the death of his mother, Clare Bremner.
His father Keith, 64, was taken to hospital in a critical condition after the events on Tuesday night.
Waikato Police Acting District Commander Naila Hassan said the increased police presence in the township was for the community's protection as well as to help with the hunt for Bremner.
"We are absolutely optimistic in finding Mr Bremner," she said at this morning's press conference. "But do not approach him."
She said there had been a lot of information coming forward, with a lot of people contacting the police with possible sightings.
"At the moment we haven't been able to locate him."
She wasn't aware if he'd contacted any of his family members to date.
It's believed Bremner may have been driving a Silver 2003 model Holden Vectra, registration BGP561.
"We urge the community to look for that vehicle, search your barns, it may well be the vehicle is parked up somewhere.
"We need the community, they are our eyes and ears and we really do rely on them to help with our investigation.
"If there are people harbouring Mr Bremner we would urge them to contact police, they will be hindering a police investigation."
Hassan was unwilling to comment on the wanted man's mental health condition.
At the conference Mayor Max Baxter thanked the community for its support so far.
"We just hope that Ross is found very, very soon, we just hope and I reinforce the community remains vigilant in their security and keep an eye on each other."
He said it was great to see the community get out there and support the police, not just with information, but with things like baked goods.
However, he urged others on social media to keep their comments to a minimum.
"There's a lot of speculation out there, I urge people to take their social media to a minimum and to not fuel the speculation," he said. "It's not helpful to the police or to the morale of the community either."
He expressed his sympathies to the family.
"We hope this comes to a conclusion very soon."
Waikato DHB confirmed earlier this week Bremner was being treated by mental health and addiction services at the time of the attacks.
"Waikato DHB can confirm that Ross Bremner is a client of our Mental Health and Addiction Services," spokeswoman Lydia Aydon said.
"He last had a period of inpatient care in 2013 and has been living in the community for the last three years."