Investigators are examining the digital footprint of Madison, Wisconsin, school shooter Natalie “Samantha” Rupnow, trying to verify a possible manifesto the 15-year-old may have left behind.

Rupnow opened fire on children and staff at Abundant Life Christian School on Monday – It rained bullets in the study hall and killed two before turning the gun on herself.

Accounts linked to Rupnow online show an obsession with possible white supremacist ideologies and notorious former school shooters, as well as a chilling message from “Unabomber” Ted Kaczynski.

Screenshots released of her alleged manifesto showed Rupnow was a lonely child who said she had been “captured and forced into my corner.”

Rupnow expressed her dissatisfaction with what she described as a broken home and referred multiple times to a therapist.

She reportedly describes herself as a “loner” but admits that she “will mourn the loss of friends, but sooner than later they will leave.”

The published pages do not refer to any particular political ideology, but rather claim: “We need a revolution.”

It ends with a quote attributed to Unabomber Ted Kaczynski: “You finally learn that boredom is a disease of civilization.”

Social media paints a more disturbed picture as she allegedly posted photos of Parkland shooter Nikolas Cruz and Columbine “Trenchcoat Mafia” members Eric Harris and Dylan Klebold.

Another sign of a possible obsession with the Columbine massacre are previously confirmed photos of Rupnow wearing the shirt of German industrial rock band KMFDM.

Jeff Rupnow posted the snap on his public Facebook page in August, showing his daughter pointing a shotgun at a clay pigeon while wearing a black top emblazoned with the band’s name.

Columbine killer Eric Harris was seen wearing a KMFDM T-shirt before the 1999 Colorado high school massacre in which 13 people were murdered.

The teenage shooters of the Columbine school massacre in Colorado in 1999 were known to be avid fans of the band, and one of the killers posted the band’s lyrics on his website.

At the time, KMFDM released a statement condemning the attack, expressing sympathy for the victims and reiterating that its music was intended to defend itself against violence.

The massacre is often viewed as a turning point in the era of American school shootings.

Rupnow appears to be gaining influence from neo-Nazi ideologies due to her social media life.

In addition to the rock lyrics, the Columbine shooters included speeches by Adolf Hitler on Harris’ website.

On an X account believed to belong to Rupnow, she posted a video of a stabbing that took place in Sweden in 2015 and ended in the death of a teacher. It was suspected that the stabber was targeting immigrants.

On Dec. 13, three days before the shooting, the account posted a video of someone taking their own life at a shooting range.

The last two posts, which were deleted minutes before Rupnow opened fire, showed someone giving the “OK” sign, which the Anti-Defamation League has called a symbol of white power.

The second was a Google Drive link with no further description, which some speculated was the manifesto.

A Tumblr possibly connected to Rupnow shows photos of guns and images from previous shootings, according to ABC News.

“Identifying a motive is our top priority, but at this point it appears that the motive was a combination of factors,” Madison Police Chief Shon Barnes said at a news conference.

He added: “A document about this shooting is currently circulating on social media, but we have not verified its authenticity.”

Barnes did not provide further details, saying he did not want to jeopardize the investigation.

Investigators are examining her cell phone, computer and online posts and trying to verify a possible manifesto the shooter may have left behind.

Some details from Rupnow’s life have come to light.

Police have confirmed the name of the street where she lived in Madison. Online records show someone named Jeffrey Rupnow lives on the same street, and a Facebook profile of a Jeff Rupnow in Madison shows photos of a newborn daughter named Natalie Lynn from 2009, 15 years ago.

Jeff Rupnow’s cover photo, published in August, shows what appears to be a young girl shooting a shotgun at a local club.

In a comment on the website, Jeff Rupnow says he and his child joined the club in the spring and “loved every second of it.”

Rupnow could not be reached for comment.

According to court documents obtained by Newsweek and the Washington Post, Rupnow and his wife Mellissa have been married and divorced multiple times.

James and Rebekah Smith, parents of a 17-year-old Abundant Life Christian School student, reveal details about one of the victims, who they believe are all family friends, as well as the shooter.

They told Fox News that Natalie “Samantha” Rupnow did not enroll in the school until the current semester.

The Smiths did not know Rupnow or her family. Her daughter claimed she never spoke to anyone.

Two students remained in critical condition, while several other victims suffered less serious injuries, officials said.

Police said Rupnow used a handgun but did not say how he got it. Earlier this year, the parents of a Michigan school shooter were found guilty of giving their son access to the weapon that killed him.

Wisconsin officials said at Tuesday’s news conference that it was far too early to say whether Rupnow’s parents could be held legally responsible.

Police Chief Barnes said such allegations do not appear to be justified at this time.

Rupnow killed a student, a teacher and then himself at Abundant Life Christian School in Madison shortly before 11 a.m. Monday.

Police received a 911 call at 10:57 a.m. Monday morning, and within three minutes, county sheriff’s deputies had arrived at Abundant Life Christian School, which serves about 420 students. Seconds later, local police arrived.

At 11:05 a.m. they said they found the shooter wounded and recovered the weapon. Rupnow was pronounced dead on the way to the hospital.

At the same time, firefighters arrived on the scene and began tending to the victims. Two students are currently in hospital with life-threatening injuries and are said to be in critical condition.

A teacher and three other students were also hospitalized with less serious injuries. Two of them were released on Monday evening.

The victims have yet to be identified and family members have yet to be notified.