This was confirmed by National Capital District assistant commissioner Anthony Wagambie when he said that Family Sexual Violence Unit officers formally charged Lieutenant Murry Oa over the mobile phone footage showing the assault take place.
The video went viral on social media, generating outrage throughout the country.
Oa was charged on Monday night with one count of grievous bodily harm, was refused bail and is being detained at Boroko Police Station.
The peak body for athletes in Oceania has, like everyone else, strongly condemned the brutal attack on Kaore.
The Oceania National Olympics Committees Athletes' Commission has added its voice of dismay to over the video images of Kaore's partner head-butting her, then beating her with a hot iron.
Kaore has represented PNG in Rugby 7s, Rugby 15s and boxing, winning medals at the Pacific Games, including a gold medal at the 2015 Pacific Games.
"The International Olympic Committee's commitment to protecting human rights is codified in the Olympic Charter," commission spokesman Karo Lelai said.
Kaore said she released the video, which has shocked Papua New Guineans, as a way to call out domestic violence.
"I'm still traumatised by what happened ... I know there are a lot of women, Papua New Guinea women out there, who go through the same thing," she told the Australian Broadcasting Corporation.
"They need to be strong, they need to get and report if it's wrong. Do what is right for you. Your life matters."
She has stitches, burns and her head is heavily bandaged but she is at home recovering.
Another prominent athlete, track and field medallist and PNG record holder De'Bono Paraka has spoken out in support of Kaore and shared her story on social media with the hashtag #JusticeforDebbie.
"What she went through is absolutely horrific and no woman should go through that. The new generation of men coming through, it's a mindset that we have to eliminate," he said.
While most people in PNG are outraged, some have defended the actions of the man as "disciplining his wife".
It is estimated more than two thirds of women in Papua New Guinea experience family violence.
In response to the latest incident, Prime Minister James Marape has called on his countrymen to respect women and admonished those who say domestic violence is cultural.
He took to Facebook to urge men to respect women and girls and not to use violence, writing "if you want to build a better and safer country, let us build a better and safer home. It all starts at the home".