He texted her about 20 minutes later and she replied saying she was on a bus full of kids.
He got another text from her about 2pm that day saying that she had been to one appointment and was on her way to another.
"That was the last I heard from her.
"I don't know what's going on. All I know is that a person can't disappear off the face of the earth. Somebody knows something ... but not knowing is the worst."
He had walked and driven around their street - Crusher Pl - their Silverdale suburb and even as far away as Kawhia in his search for King.
"I have been walking everywhere, driving everywhere, just hoping that she will show up."
He said police were hoping to get CCTV footage of the doctor's surgery she said she was visiting, as well as from WINZ and the bus she had caught.
He was concerned for her health as she had rheumatoid arthritis and asthma.
He had asked to take the day off work, as had King's son Montoya, 21, who was hoping to get a day off as stress leave.
He said he was a bit of a mess when his mum first went missing but now he was trying to focus on finding her.
"It's not like her to disappear. If she would disappear for a few days she would contact me or my sister [Ngahia, 11]."
He last spoke to her Friday morning when she asked for a ride to take her shopping that night.
He tried to contact her but wasn't able to reach her. He then got a call from Reeve that evening to ask if he had seen her.
He said his mum was "always in good spirits" and wasn't aware of any issues she might have.
Montoya said he was tired and drained but determined to find his mum.
"I'm over-tired but I need to find my mother."
Reeve said King is about 165cm tall and was last seen wearing a long, black, hooded polyester jacket with blue jeans, a pink shirt and grey ankle-high Bata Bullet shoes.
Anyone with information as to her whereabouts is urged to phone Hamilton police on 07 858 6200.
