Police said Monday that the gunman who killed four people at a megachurch in Colorado Springs and a missionary training school in Arvada was the same person.

Police said Matthew Murray was "responsible for the crime" and that the handgun found at the church in Colorado Springs was forensically linked to the handgun used in the shooting in Arvada.

"Testing has confirmed the handgun found at the church in Colorado Springs is forensically linked to shell casings found at the crime scene in Arvada," said Chief Don Wick of the Arvada Police Department.

Murray, 24, was home-schooled by his family and raised in what a friend said was a deeply religious Christian household. Murray's father is a neurologist and a prominent multiple-sclerosis researcher.

Five people -- including Murray -- were killed, and five others wounded Sunday in the two eruptions of violence 12 hours and 65 miles apart.

Authorities searched Murray's home in unincorporated Arapahoe County early Monday.

Five people, including a gunman, died in the attacks Sunday at a megachurch in Colorado Springs and at the Youth With A Mission missionary center in Arvada. Five others were wounded in the church shootings.

Authorities could be seen coming and going from Murray's home, and at one point searching the bushes in the front and in the back yard. The federal Bureau of Alcohol, Tobacco and Firearms and the Arapahoe County bomb squad were also involved in the search at the home on East Berry Place and Havana Street.

After the lengthy search -- during which many boxes of material were removed -- authorities took down crime scene tape and left the home without disclosing what they found.

Neighbors said the family has lived at that home for 10-plus years and has two sons, the younger son attends a religious school.

"It's just crazy just hearing about it. I was thinking about how I knew them so long ago. ... They were a really religious family," said neighbor Cody Askeland.

Murray's father, Dr. Ronald Murray, is a well-known neurologist with a practice in Lone Tree. His office was closed Monday and a message on his phone line said, "Dr. Murray's office is closed and he will not be available until further notice."

A Cherry Creek School District spokeswoman said that Murray was home-schooled and she doesn't have any record of him attending a high school in the area or receiving a diploma.

New Life Church and Youth With A Mission are connected in several ways. There is a Youth With A Mission office on the New Life Church campus, and many members of New Life have completed the YWAM's school and discipleship programs. They have also worked together in local evangelical outreach programs.

Witnesses Describe Shootings

The violence began about 12:30 a.m. Sunday, when a man pulled a handgun and opened fire at the Youth With A Mission center after he had been denied a request to spend the night there. Witnesses told police that the gunman was a white man in his early 20s, wearing a dark jacket and skull cap and carrying a handgun.

More than 12 hours later, at New Life Church in Colorado Springs, a gunman with a high-powered rifle entered the church's main foyer and opened fire, Colorado Springs Police Chief Richard Myers said. Three people, including the gunman, were killed and three others were wounded.

Jessie Gingrich had left New Life and was in the parking lot getting into her car when she saw the gunman get a rifle from his trunk and open fire on a van full of people.

"A man got out of his car and pulled out a huge rifle and my first thought was, 'That can't be a real gun,' and he started shooting," said Gingrich. "I was absolutely positive that I was going to be next."

She said she then cowered in her car, fumbling with the ignition key.

"I was just expecting for the next gunshot to be coming through my car. Miraculously -- by the grace of God -- it did not," she told ABC's "Good Morning America." "I believe the only reason I got away was because he had to stop and reload his gun."

She said she doesn't believe the gunman recognized his targets.

"I don't know if it was someone he recognized but an entire family had just gotten in their van and he had a very clear view that they had done that. I just think he was going for as many people as he could," she said.

Ashley Gibbs was getting into a car with David Harris when they heard the gunshots -- a sound like someone kicking ice from the side of a car, she said. Harris said he saw the gunman, and it looked like he knew how to handle a weapon.

"I was in the military for about three years, and the way he was holding the rifle looked just like the way we were taught to when I was in the military," he told NBC's "Today" show.

They stayed in the vehicle and prayed for the gunman.

"It was obvious that he was in some sort of pain and going through a lot," Gibbs said. "I just prayed God would bring him peace."

Colorado Springs Victims Identified

The victims killed in the Colorado Springs shooting were identified Monday as sisters Stephanie Works, 18, and Rachael Works, 16. Their father, David Works, 51, suffered two gunshot wounds -- one to the abdomen and one to the groin -- and was listed in fair condition on Monday. They were shot in the parking lot as they were getting into their van.

"Our concern is for our family that lost two teenage daughters. Our hearts are grieving this morning for them," said New Life's Senior Pastor Brady Boyd. "You can imagine, as parents, losing two children while coming to church, just showing up for a worship service, not bothering anyone."

The teenage girls were home-schooled, according to the Denver Post. One of the teens had just returned from a mission overseas that was sanctioned by the church.

The Works family had been with New Life Church for a 1 1/2 years.

"I'm asking Colorado Springs and the country to please pray for that family this morning because they're going through a very difficult time," said Boyd.

Judy Purcell, 40, was shot in the right shoulder and was treated and released. Larry Bourbannais, 59, was shot in the forearm and treated and released.

Arvada Victims Identified

The two dead victims at the missionary center were identified as Tiffany Johnson, 26, and Philip Crouse, 24.

Johnson, who grew up in Chisholm, Minn., loved working with children and wanted to see the world, said family friend Carla Macynski.

"Tiffany was a well-liked, easygoing 26-year-old. She was friendly, adventurous and a definite leader. She wanted to see the world," Macynski said as she choked back tears. Johnson had traveled to Egypt, Libya and South Africa with the missionary group.

Crouse, of Alaska, had helped build a foster home at a Crow reservation in Montana, said Ronny Morris, who works with a Denver chapter of the mission.

Staffer Dan Griebenow, 24, of South Dakota, was shot in the neck, according to Youth With A Mission. Staffer Charlie Blanch, 22, suffered gunshot wounds to his legs, according to ministry officials. His hometown wasn't immediately known.

Griebenow has been upgraded from critical to serious condition.

The live-in Christian missionary center is on the grounds of the Faith Bible Chapel. Cheril Morrison, wife of chapel pastor George Morrison, said Crouse had just hung up Christmas lights at her home and that Johnson was "an amazingly beautiful person."

Mimi Martin, who lives near the center, said she received a warning call at about 9 a.m. telling neighbors to keep their doors and windows locked.

"Why would anybody want to hurt those kids?" Martin said.

Darv Smith, director of a Youth With A Mission center in Boulder, said people ranging from their late teens to their 70s undergo a 12-week course that prepares them to be missionaries. He said the center trains about 300 people a year.

Paul Filidis, a Colorado Springs-based spokesman with Youth With A Mission, said staffers are usually former missionaries themselves and that the "mercy ministries" performed by trainees include orphanage work.

Youth With A Mission was started in 1960 and now has 1,100 locations with 16,000 full-time staff, Smith said. The Arvada center was founded in 1984.

"Violent crimes of any sort are tragic enough, but when innocent people are killed in a religious facility or a place of worship, we must voice a collective sense of outrage and demonstrate a renewed commitment to keeping our communities safe," said Gov. Bill Ritter.

The Colorado shootings came only days after a 19-year-old gunman opened fire at a popular mall in Omaha, Neb., killing eight people and himself.

"The violence over the weekend against young missionaries in Arvada and against worshippers at New Life Church in Colorado Springs would be heart-rending in any season, but it is especially bitter during this time of preparation for Christmas, the birthday of the Prince of Peace," said the Rev. Charles Chaput, Archbishop of Denver. "Along with the whole Catholic community in Colorado, I pray that God will heal the suffering inflicted by these terrible events, and sustain the hope and faith of the people at New Life Church, Youth With A Mission and Faith Bible Chapel. For those struggling personally with this sorrow, may God penetrate and redeem even this tragedy with the peace of Christmas and Christ's promise of eternal life."