Colorado Springs, Colorado (CNN) Robert Lewis Dear, the suspect in Friday's shootings at the Planned Parenthood clinic in Colorado Springs, mentioned "baby parts" to investigators and in later interviews expressed anti-abortion and anti-government views, a law enforcement official briefed on the investigation told CNN.

Law enforcement officials caution it's too early to determine a motive in the case until all evidence is gathered and examined. That process is still going on. Though the state is taking the lead, the FBI is conducting its own investigation to determine whether federal charges will be filed.

The official told CNN that propane tanks were found in the area of Dear's car in the parking lot, and that authorities believe he was trying to shoot them to cause an explosion.

The siege ended Friday when the suspect dropped his gun and surrendered in a hallway once the SWAT team brought in a BearCat armored vehicle and Dear was cornered.

'Crime against women'

Attorney General Loretta Lynch has called the shooting, which killed three people and wounded nine more, a "crime against women"; Colorado Gov. John Hickenlooper has said it's "a tragedy that is beyond speech."

"There was no way any of us could have kept him here," UCCS Police Chief Brian McPike said of Swasey during a Saturday evening vigil. "He was always willing to go. ... He had an enthusiasm that was hard to quell." Among the victims was Garrett Swasey , a University of Colorado-Colorado Springs police officer who rushed to the clinic to offer his assistance."There was no way any of us could have kept him here," UCCS Police Chief Brian McPike said of Swasey during a Saturday evening vigil. "He was always willing to go. ... He had an enthusiasm that was hard to quell."

Officer Garrett Swasey was killed in Friday's Planned Parenthood shooting.

Colorado Springs Police Chief Peter Carey said that the identities of the other two victims likely will not be released until Monday, after autopsies have been performed.

In addition to the three killed, five officers and four civilians were hospitalized for wounds sustained in the shooting. Lt. Catherine Buckley said Friday night all were in good condition. By late Saturday afternoon, officials said five patients remained in two hospitals.

Opposition to abortion eyed as motive

"I'm not going to say the perpetrator's name," a somber Hickenlooper said Saturday, referring to Dear, the man authorities suspect was the shooter.

Dear, 57, is being held without bail in a Colorado Springs jail, according to the El Paso County Sheriff's Office.

Robert Dear is suspected in the Planned Parenthood shooting.

While authorities said that a motive had not yet been established, Mayor John Suthers said "inferences (could be made) from where it took place," the Denver Post reported

Vicki Cowart, president of Planned Parenthood of the Rocky Mountains, went beyond an inference, saying the shooter "was motivated by opposition to safe and legal abortion." Lynch, who called the "unconscionable attack" a "crime against women receiving health care services," pledged the full resources of her office for the investigation.

Planned Parenthood, which delivers reproductive health care and sex education to women and men across the United States, has come under attack before.

At least three Planned Parenthood buildings have been vandalized since September, when the organization was criticized in Washington and by some Republican presidential candidates after an anti-abortion group released videos alleging that it sold fetal organs and parts for profit. Planned Parenthood has disputed the veracity of the videos, contending that they are heavily edited and provide a distorted account.

Who is Robert Lewis Dear?

Based on a public records search, Dear appears to have lived in Colorado for only about a year. In October 2014, Dear purchased property in Hartsel, a rural community about 65 miles west of the clinic, for $6,000. Zigmond Post, a neighbor, said one of the few interactions he had was when Dear brought him some anti-Obama pamphlets. "That's about all I've run into him," he said.

Prior to Hartsel, Dear appears to have spent much of his life in the Carolinas.

WLOS, a CNN affiliate in Asheville, North Carolina, photographed a dilapidated-looking mountain cabin that Dear reportedly called home in rural Buncombe County. The sheriff's office there said it only had one recorded contact with Dear, a civil citation issued in 2014 for allowing his dogs to run wild.

A decade before that, Dear was arrested and charged with two counts of animal cruelty while living in South Carolina, but he was found not guilty in a 2003 bench trial. In 2002, Dear was charged with being a peeping Tom; those counts were dismissed in South Carolina. In 1997, Dear's wife accused him of domestic assault, although no charges were pressed, according to records provided by the Colleton County, South Carolina, sheriff's office.

Dear is scheduled to appear at 1:30 p.m. Monday before Chief Judge Gilbert Martinez, El Paso County court spokesman Rob McCallum said.

Scanners capture police plans

Conversations captured over the police scanner gave glimpses into Friday's drama as well as the strategic debate about what to do.

Despite initial fears that the gunman might be running around outside, authorities later determined that he was inside the Planned Parenthood building -- once he got through the front door -- throughout the siege, Buckley said.

Joan Motolinia's sister was among those inside. She called her brother Friday afternoon, and "I heard the shooting," a tearful Motolinia said.

"She couldn't say much because she was afraid," he said.

Kentanya Craion, who had visited the clinic for an ultrasound, said she saw the gunman shooting as she left outside in the parking lot, so she turned around and ran back inside. "He had no remorse," Craion said. "This was just a game to him."

Photos: Shootout in Colorado Springs A suspect is in custody on Friday, November 27, in Colorado Springs, Colorado. Police were in a shootout with a gunman inside a Planned Parenthood facility, hours after a shooter was first reported in the area. Hide Caption 1 of 19 Photos: Shootout in Colorado Springs People in the building across from Planned Parenthood in Colorado Springs start to emerge from hiding. Hide Caption 2 of 19 Photos: Shootout in Colorado Springs A bus of evacuees make its way towards neighboring hospitals. Hide Caption 3 of 19 Photos: Shootout in Colorado Springs Colorado Springs Fire Department Chief Christopher Riley, center, takes questions from the media. Hide Caption 4 of 19 Photos: Shootout in Colorado Springs An unidentified victim is transported to an ambulance. Hide Caption 5 of 19 Photos: Shootout in Colorado Springs People are helped to safety. It was not immediately clear at the time of the attack whether Planned Parenthood was the target of the shooting. Hide Caption 6 of 19 Photos: Shootout in Colorado Springs An officer waits at an intersection near the scene of a shooting. Hide Caption 7 of 19 Photos: Shootout in Colorado Springs A woman is escorted to an ambulance by police near the scene. Hide Caption 8 of 19 Photos: Shootout in Colorado Springs Police sit on the roof of a Chase Bank branch across the parking lot from the scene at Fillmore Street and Centennial Boulevard. Hide Caption 9 of 19 Photos: Shootout in Colorado Springs Colorado Springs Police Lt. Catherine Buckley addresses the media during the incident. Eleven people have been transported to local hospitals, she said. Five are police officers from various responding agencies. Hide Caption 10 of 19 Photos: Shootout in Colorado Springs Colorado Springs rescue personnel stand ready near the scene. Hide Caption 11 of 19 Photos: Shootout in Colorado Springs People are escorted to an ambulance during the standoff. Hide Caption 12 of 19 Photos: Shootout in Colorado Springs A police officer stands guard. Hide Caption 13 of 19 Photos: Shootout in Colorado Springs Rescued people are escorted from the area by emergency personnel. Hide Caption 14 of 19 Photos: Shootout in Colorado Springs The shooting, first reported around 11:30 a.m. (1:30 p.m. ET), left a nearby shopping center on lockdown as police searched for the gunman. Hide Caption 15 of 19 Photos: Shootout in Colorado Springs An officer patrols the perimeter. Denise Speller, who works at a nearby salon, said she heard at least 10 gunshots go off and saw a police officer get hit. Hide Caption 16 of 19 Photos: Shootout in Colorado Springs It was not immediately clear whether Planned Parenthood was the target of the shooting. Police said the original 911 call came from the building. Hide Caption 17 of 19 Photos: Shootout in Colorado Springs Police officers respond to the scene. Hide Caption 18 of 19 Photos: Shootout in Colorado Springs Colorado Springs police officers search the area near the scene. Hide Caption 19 of 19

Obama: 'Enough is enough'

In a statement Saturday, President Barack Obama didn't mention the controversies surrounding Planned Parenthood, but he did offer praise for Swasey, condolences to the families of the victims and condemnation of the attack as another example of gun violence.

"The last thing Americans should have to do, over the holidays or any day, is comfort the families of people killed by gun violence -- people who woke up in the morning and bid their loved ones goodbye with no idea it would for the last time," Obama said. "And yet, two days after Thanksgiving, that's what we are forced to do again."

As he has time and again after mass shootings, the President called on policymakers to do something to prevent them.

"This is not normal. We can't let it become normal," he said. "If we truly care about this -- if we're going to offer up our thoughts and prayers again, for God knows how many times, with a truly clean conscience -- then we have to do something about the easy accessibility of weapons of war on our streets to people who have no business yielding them.

"Period. Enough is enough."