LOVELAND- Last June, Karen Garner sat handcuffed to a bench inside a booking cell weeping and in pain.

No one had come to treat her fractured arm and dislocated shoulder hours after Loveland, Colo., police violently arrested the 73-year-old with dementia, her family said.

Meanwhile, about 10 feet away, three officers sat hunched around a computer as they re-watched body-camera footage of Garner’s arrest, a new video released by the attorney representing Garner’s family shows.

“Ready for the pop? Hear the pop?” the officer who initially handcuffed Garner can be heard saying, referencing the moment he injured her shoulder.

The nearly one-hour booking cell video released Monday shows two Loveland Police Department officers who participated in Garner’s arrest fist-bumping each other while discussing the incident. At one point, they are joined by another officer as they mock and praise the arrest, which they claimed “went great,” while referring to Garner as “ancient,” “senile” and “flexible.”

“We crushed it,” one of the officers says.

Sarah Schielke, an attorney representing Garner’s family, called the video “heart-wrenching” and “unseeable.” Schielke, who obtained the initially inaudible video last August, worked with a forensics audio engineer to capture the dialogue.

“At one point, I broke down and I wept because it was so raw, wrong and heartless,” Schielke told The Washington Post. “I don’t even know Karen, but it could have been my grandmother and I can’t imagine what the experience of having to live through that would be.”

Two weeks ago, following public outcry after body-camera footage of the incident was released, the city announced it would open an independent investigation into Garner’s treatment. Colorado’s Eighth Judicial district attorney, Gordon McLaughlin, said his office’s critical response team would investigate whether there was “any potential criminal behavior” by the Loveland officers.

On Tuesday, a Loveland police spokesman said four officers including Austin Hopp, the first to handcuff Garner, have been suspended. The criminal investigation will be conducted by McLaughlin’s office and the Fort Collins Police Department.

“Loveland Police Chief Bob Ticer strongly advocated for the criminal investigation, in consultation with the DA and other police agencies,” Tom Hacker, a Loveland police spokesman said in an email.

In a statement shared with The Post, McLaughlin said he has reviewed the booking cell footage released on Monday and that the investigation “is a priority for my office.” “The statements on the videos are very concerning,” McLaughlin said. “I will consider those statements along with all relevant evidence … in making a charging decision.”

Garner’s family, which filed a federal lawsuit against the city and three of the officers two weeks ago, has since filed an amended complaint adding two more Loveland officers for allegedly failing to intervene or provide medical care to Garner based on the recently released booking video.