The family of Kirby Brown, one of two people to die last Thursday during a rigorous spiritual cleansing ceremony at an Arizona sweat lodge, is awaiting autopsy results that they hope will shed light on how the healthy 38-year-old died unexpectedly. Brown's family members insist that "something went horribly wrong."

Brown, from Westtown, N.Y., and 40-year-old James Shore of Milwaukee, died after sitting in a sauna-like tent at a scenic Arizona resort. Nineteen others were taken to hospitals, suffering from burns, dehydration, respiratory arrest, kidney failure or elevated body temperature.

Brown's family members told My FOXPhoenix on Sunday that they are awaiting the results of an autopsy as well as an investigation that they hope will explain how Brown — an avid surfer whom they described as perfectly healthy — died at the Angel Valley Retreat Center in Sedona, Ariz.

"They didnt make it out but 19 other people were injured, so we know there were more than 16 people in the tent, so we'll be able to figure out exactly what did happen," Brown's cousin, Tom McFeeley, told MyFOXPhoenix.

Participants inside the sauna-like sweat lodge were expected to complete eight rounds of crouching inside the low, hot tent, each round lasting up to 30 minutes, surrounded by dozens of people.

Family members told MyFOXPhoenix that Brown enjoyed motivational exercises, and had been to other retreats hosted by the event's host, self-help expert and author James Arthur Ray.

"We're at the point where we're mourning, and we know our friend, our cousin, our daughter is not going to come through that front door anymore," McFeely told MyFOXPhoenix.

Brown had no pre-existing health conditions that would have kept her from participating in an otherwise safe activity, McFeely said.

"Our only thought is shock, sadness and surprise," McFeeley said. "There will be plenty of time to react to the truth of what happened here, but we believe it is pointless to be angry or to place blame or to make assumptions before we understand what occurred here."

Matt Collins, who knew Shore since the seventh grade, described his friend as a wonderful husband and father whose life revolved around his three kids. "Everybody who got to know him absolutely loved him," Collins told The Associated Press.

Collins said he was stunned to hear of Shore's death, and that the family remained in shock.

"Right now we're trying to focus on making sure that his wife, his children are comforted during this time," he said.

Autopsies on Brown and Shore were conducted Friday, but the results weren't disclosed pending additional tests. Authorities have ruled out carbon monoxide poisoning as the cause.

Yavapai County Sheriff Steve Waugh said Saturday that his detectives were focusing on self-help expert and author James Arthur Ray and his staff as they try to determine if criminal negligence played a role. Waugh said Ray refused to speak with authorities and has since left the state.

"We will continue this investigation down every road that is possible to find out if there is culpability on anybody relative to the deaths of these individuals," Waugh said. He said it could be three to four weeks before they knew if criminal charges would be filed.

Ray's recent postings on his Twitter account said he was "shocked and saddened" by the tragedy.

"My deep heartfelt condolences to family and friends of those who lost their lives," he wrote. "I am spending the weekend in prayer and meditation for all involved in this difficult time; and I ask you to join me in doing the same."

Ray's company, James Ray International, is based in Carlsbad, Calif. Ray's publicist, Howard Bragman, expressed condolences in a statement Friday but declined to speak about the deaths. Bragman didn't return a call for additional comment Saturday.

The Angel Valley Retreat Center is owned by Michael and Amayra Hamilton, who rented it to Ray for a five-day "Spiritual Warrior" retreat that promised to "absolutely change your life."

On Saturday, Amayra Hamilton said Ray has held the event at the resort for seven years, and there never have been any problems.

Hamilton said the resort remains closed to the public. The sweat lodge has been dismantled and a ceremony was conducted for those affected by Thursday's incident.

"The whole situation is very traumatizing for everybody," she said.

People attending Ray's retreat, whose ages ranged from 30 into the 60s, paid between $9,000 and $10,000 to attend.

Ray and his staff constructed the temporary sweat lodge with a wood frame and covered it with layers of tarps and blankets, Waugh said. The sweat lodge — a structure commonly used by American Indian tribes to cleanse the body and prepare for hunts, ceremonies and other events — was 53 inches high at the center and about 30 inches high around the outer edges.

Between 55 and 65 people were crowded into the 415-square-foot space during a two-hour period that included various spiritual exercises led by Ray, Waugh said. Every 15 minutes, a flap was raised to allow more volcanic rocks the size of cantaloupes to be brought inside.

Authorities said participants were highly encouraged but not forced to remain in the sweat lodge for the entire time.

Joseph Bruchac, author of "The Native American Sweat Lodge: History and Legends," called the number of participants in the lodge "appalling."

"If you put people in a restrictive, airtight structure, you are going to use up all oxygen," he said by phone Saturday from his home in Saratoga Springs, N.Y. "And if you're doing a sweat, you're going to use it up that much faster."

American Indian sweat lodges typically hold about 12 people and are covered with blankets made of natural materials, such as cotton or wool, and the air flow isn't restricted, he said.

"I don't see how the person running that lodge could have been aware of the health and well-being of that many people," he said.

The participants had fasted for 36 hours as part of a personal and spiritual quest in the wilderness, then ate a breakfast buffet Thursday morning. After various seminars, they entered the sweat lodge lightly dressed at 3 p.m.

Two hours later, a woman dialed 911 to say that two people, whom Waugh identified as Brown and Shore, did not have a pulse and weren't breathing.

A nurse hired by Ray was directing rescue efforts including CPR when emergency crews arrived, Waugh said. Shore and Brown were pronounced dead when they arrived at a hospital.

Sheriff's Lt. David Rhodes said authorities were checking whether there was a lag time between the first signs of medical distress and the emergency call.

McFeeley said Brown had attended similar retreats, although he wasn't certain whether any were hosted by Ray. He said Brown, who grew up in Brooklyn and Westtown and spent time in Mexico, saw the outing as a chance to continue on a positive path in life.

Brown, a graduate of the State University of New York at Geneseo, had two sisters who recently got married, two new nephews and a focus on "making the world more beautiful for someone, not only with her art but with her heart," McFeeley said. Although the family is saddened by her death, he said Brown created a roadmap by which others should live.

"She was the least selfish, kindest person I knew," he said.

Click here for more from MyFOXPhoenix.com.

The Associated Press contributed to this report.