Law enforcement officers and explosion experts told The New York Times that the suspect, a bomber at the Palm Springs fertility clinic, was a rocket enthusiast with radical views and a large amount of high-range explosives that seemed to have precisely used upscale explosives during his attack.

DNA tests confirmed the 25-year-old suspect Guy Edward Bartkus was killed in an explosion that was torn by the U.S. Reproductive Center building and injured four people in a resort city, the FBI said on Monday. The bombing happened when the clinic was closed and was investigated as "intentional act of terrorism."

An hour away, in the small town of Twenty Nine Palm Trees, FBI agents continued to comb through a recorded house, indicating that he shared with his mother where they recovered the explosive material. Residents near the explosion prevention area said some were allowed to return to their homes Monday afternoon.

In the days after the bombing, it was unclear how Battercus got a large amount of fatal cache.

Twentynine Palms is home to the Marine Air Ground Combat Center, touted as the world's largest marine training base. A Marine Corps spokesman said Batcus had no affiliation with the military branch. Battercus also has no record of entering the base, said Captain John Hoyzar, a spokesman for the combat center.

Huizar does not comment on any recent examples of missing or stolen explosives, but instructs the Times to submit a formal record request.

According to news reports at the time, in 2021, during training practice, 10 pounds of plastic explosives disappeared from the Twenty-Nine Palm Base and were suspected of being stolen. According to subsequent news reports, the material was eventually recycled, but the military rarely released information about the incident. Huizar declined to provide any other information on Monday.

Scott Sweetow, a former bomb expert in federal alcohol, tobacco, guns and explosives, said the close distance between the suspect and the military base would be a natural inquiry for investigators, who will interview people on the Battercus social network, focusing on anyone with a safe removal that can provide explosive safety.

Materials in nearby military training areas and shooting ranges can also be used to make explosives. Sweetow said he worked in a similar case early in his ATF career, where the suspect built pipeline bombs from consumer ammunition and used them for attacks throughout the South and as far as Chicago.

"But if it turns out it's from the internet, the dark web, or YouTube, you really can't do it," Sweetow said.

Hobbyists and others can buy most chemicals used to make explosives online. The Consumer Product Safety Commission stipulates companies that sell materials, but there is little oversight for those who purchase chemicals that can be used to make explosives. A major supplier, Skylighter, warned that federal regulations require it to review all orders for use in the construction of M80s and other illegal explosion fireworks.

Even if Bartkus is researching or buying bomb-making materials without trying to cover his tracks online, he would be "disappointed or surprised to know that there is no full AI program or software the department uses to sift through its search history."

Sweetow said he was shocked by images from the scene of the Palm Springs explosion, and the bomb's destructive power seemed to be concentrated in one direction. Authorities say the explosives were detonated from the interior of the 2010 silver Ford Fusion sedan. Researchers are still determining whether Battercus was inside or outside the vehicle when the explosion was exploded. They said they believed he had tried to bombard vividly.

"The explosion usually radiates energy and effects in an arc of 360 degrees, but the scene seems to be concentrated in the building," Sweetow said.

The suspect could have done this with the suitcase "tilted so that it faces the back of the building",” he said, adding that the suspect may not understand what he is doing with explosive physics.

Based on testing ATFs conducted in the 1990s, he said, researchers could roughly estimate how much explosives would be needed to generate a certain explosion radius.

"One pound will destroy the gas tank, and if it is soft dirt, it may leave traces, while 10 pounds will "erase the inside of the car." "Twenty pounds will punch holes in the asphalt." ”

The high intensity of the Palm Springs explosion narrowed the list of materials used for potential bomb manufacturing, the owner of a fireworks company said. The list includes ammonium nitrate, usually a popular fertilizer for farms and garden shops. This is a chemical used by Timothy McVeigh when bombing the Oklahoma Federal Building in 1995, killing 168 people. McVeigh detonated an impromptu 4,800-pound TNT equivalent explosive device on a rented truck outside the building.

Law enforcement sources told The Times that Bartcus is a Rockets enthusiast and Sweetow said investigators will be of particular interest.

Richard Bartkus, the suspect's estranged father, told The Times that his son was fascinated by fire as a child and a 9-year-old once burned the house they rented.

Julie Heckman, executive director of the American Fireworks Association, said commercial-grade materials for explosives are highly regulated.

"But you're talking about what we call a fan loophole," she said, allowing people over 18 to buy a small amount of explosive material. "When intentions, there are ways," Heckman said.

An FBI official said the Palm Springs explosion was the biggest in his memory, surpassing destruction even seven years ago in Orange County cases. In 2018, Rocket enthusiast Stephen William Beal used a family-cooked bomb to kill his wife on her Aliso Viejo Spa.

This explosion tear up a part of the building and sends body parts into the street. Police recovered 130 pounds of bomb-making chemicals from the garage of Bill’s Long Beach home, FBI terrorism investigators said in court documents.

Akil Davis, assistant director of the FBI's Los Angeles field office, said the explosions at the Palm Springs fertility clinic on Saturday were many times bigger.

They said investigators are studying a range of online material related to bombing, including social media, manifesto published online, and YouTube accounts referring to explosives. A website without a name but seems to be related to bombing, lists cases of “war against loved ones” and says there will be a target for a fertility clinic.

The site comes with a 30-minute audio file labeled "Pre", which begins with the speaker, who said he will explain "why I decided to bomb an IVF building or clinic."

"Basically, it's just me being angry at my presence and you know, no one agrees to bring me here," the speaker said.

The username associated with Bartkus' email address is "Fireworks Technology", accompanied by a soldier's avatar with a red rose in his mouth.