Updated at 9:05 a.m. Tuesday: Revised to include that Aaron Dean has been released on bond.

The Fort Worth officer who fatally shot 28-year-old Atatiana Jefferson in her home this weekend was jailed on a murder charge Monday.

Aaron Dean was booked into the Tarrant County Jail Monday, Oct. 14, 2019. He resigned from the Fort Worth Police Department after he fatally shot Atatiana Jefferson in her home Oct. 12. (Tarrant County Jail)

Aaron Dean, 34, was booked Monday evening into the Tarrant County Jail, where his bail was set at $200,000. He was released on bond at 9:15 p.m., a spokeswoman with the Tarrant County Sheriff’s Department said.

Dean had resigned from the Fort Worth Police Department earlier in the day.

Interim Police Chief Ed Kraus said he had intended to fire Dean, who was set to be interviewed Monday morning, but Dean quit first. His record will reflect a dishonorable discharge.

Kraus said Dean resigned before he answered any questions.

Dean, who had been on the force since April 2018, has not been cooperative, the chief said.

“He resigned before his opportunity to be cooperative,” Kraus said.

The chief said the department normally investigates officer-involved shootings with two separate but concurrent processes: an internal affairs investigation and a criminal investigation, with the criminal investigation taking precedence.

Fort Worth police spokesman Sgt. Chris Daniels said at a brief news conference Monday night that the department took Dean into custody about 6 p.m. He said the department is still “working diligently to complete the criminal and administrative investigations” and is in close contact with the Tarrant County district attorney’s office.

Police did not take any questions at the news conference. The chief is expected to provide an update Tuesday.

The charge against Dean came less than two weeks after former Dallas police Officer Amber Guyger was convicted of murder for shooting Botham Jean in his apartment last year. Guyger, who said she believed that she was at her apartment and that he was an intruder, was sentenced to 10 years in prison.

28-year-old shooting victim Atatiana Jefferson (Family photo courtesy of NBC5)

Jefferson’s two sisters and brother told The Dallas Morning News in a interview Monday night along with their attorney Lee Merritt that Dean’s arrest was a good first step.

“I remember Lee talking about them not liking to arrest cops, so they did that,” said Jefferson’s brother, Adarius Carr. “That’s a huge step for us. They are willing to understand this is serious and we mean it. Justice is important to us.”

The family said they want to see Dean indicted but they really aren’t sure what comes next.

“This has been such an unimaginable thing that we are still trying to process,” said Jefferson’s oldest sister, Ashley Carr. The three siblings said late Monday night that they’d been awake since the sun rose.

Merritt, who handles civil cases involving police shootings nationwide. said officers usually aren’t arrested and handcuffed before the case is sent to a grand jury.

He said that has only happened with Guyger and with Balch Springs police officer Roy Oliver, who was sentenced to 15 years in prison in 2018 for murdering Jordan Edwards. Oliver fired into a car the 15-year-old was in as it drove away from the officer. Both Guyger and Oliver were convicted in Dallas County.

Merritt and the family called for an independent investigation into the shooting at a news conference earlier Monday.

Ashley Carr said her sister had recently moved home to care for her mother, who was in declining health and remained hospitalized Monday.

The night she was killed, Jefferson was simply enjoying life in her home, “where no one would have expected her life to be in harm’s way, especially not at the hands of a civil servant who had taken the oath to serve and protect," Carr said.

Relatives called for the federal government to investigate the shooting, citing the department’s recent record of officer-involved shootings. Since June 1, Fort Worth officers have killed six people, including Jefferson. One other person was wounded.

Merritt, the family’s attorney, said the department was in need of “serious systematic reform.”

“I want to go ahead and dispel the myth that this is somehow a one-off — that this was just a bad-luck incident from an otherwise sound department," he said. “The Fort Worth Police Department is on pace to be one of the deadliest police departments in the United States.”

Amber Carr, left, wipes a tear as her sister Ashley Carr, center, talks about their sister, Atatiana Jefferson, their brother, Adarius Carr, right and attorney Lee Merritt, standing, listen during a press conference at 1910 Pacific on Monday morning, October 14, 2019 in downtown Dallas. Atatiana Jefferson, a 28-year-old black woman, was shot and killed in her home by a white Fort Worth police officer during a welfare check. (Irwin Thompson / Staff Photographer)

Carr, reading a statement from the family, asked officials to follow the example of her sister’s character.

She asked the city to “be honorable when it comes to narrating the memory of this beautiful soul.”

“To have integrity and bring the federal government in to investigate,” she continued. “To be committed to a swift and appropriate prosecution. To serve the entire community of Fort Worth by training your officers to execute responses to appropriate situations.”

Activist Cory Hughes, who also spoke at the news conference, called for the officer who shot Jefferson to be “charged like the criminal that he is.”

“This life mattered. This family matters, and we’re demanding justice," he said. "We’re not going to wait. We demand justice now.”

The department has submitted the case for a possible review by the FBI, which will accept or reject it based on a decision about whether civil rights violations occurred.

The department stripped Dean of his badge and firearm Sunday, the same day it served him with a written administrative complaint in relation to the shooting.

If Dean had been fired, it would have been for violations of Fort Worth police policy on use of force, de-escalation and professional conduct, Kraus said.

“We received many calls from the community expressing their concerns and demands,” he said. “I assure you as chief for this department I share those concerns, and I demand a thorough, transparent and speedy investigation. This will not be an opportunity for us to make excuses, but rather to investigate this case to the fullest, to provide the justice we all seek for Atatiana.”

Ft Worth Mayor Betsy Price, left, as to Interim Police Chief Ed Kraus, talks during the Fort Worth Police Department's press conference about the officer involved shooting of Atatiana Jefferson at the Bob Bolen Public Safety Complex on Monday, October 14, 2019 in Fort Worth, Texas. (IRWIN THOMPSON/Staff Photographer / Staff photographer)

The department will continue its internal investigation as if Dean were still an officer, the chief said.

State law enforcement records show Dean’s most recent training was 40 hours of crisis intervention training in August. He became a full-time peace officer April 13. 2018, and earned a bachelor’s degree from the University of Texas at Arlington. No law enforcement history besides Fort Worth police, is listed on his record.

It’s unclear whether Dean has an attorney. The Combined Law Enforcement Associations of Texas said in a written statement that its legal team will represent the former officer.

Jefferson’s relatives emphasized their hope that the federal government or another outside organization will investigate the shooting.

Her brother told reporters that his 12 years of service in the Navy had shown him that someone who fails to follow procedures needs to face consequences.

“I’ve been trained and taught that there are pre-planned responses to everything you do,” Adarius Carr said. “When you don’t do it the way you’ve been trained, the way you’ve been taught, you have to answer for that.”

Before the officer had been taken into custody, Adarius Carr had called for the officer’s arrest.

“This man murdered someone," he said.

Photos: Vigil and protests for 28-year Atatiana Jefferson, who was fatally shot by Fort Worth police in her home

Kraus said the Texas Rangers are not in an ideal position to take over the investigation because they would be doing so late in the process.

City Manager David Cooke said the city is on track to consider candidates in November for a police monitor position, as previously recommended by a city task force. The city is also reaching out to national experts to form a third-party panel that will review police policies and training, Cooke said.

The chief was asked what he says to people who say cases like Jefferson’s are the reason they don’t trust Fort Worth police.

“I tell them I get it,” Kraus said. “Nobody looked at that video and said there’s any doubt that this officer acted inappropriately. I get it."

He said the department wants to ensure that its officers are better trained and that they act the way citizens expect — “with a servant’s heart, rather than a warrior’s heart," he said.

Gov. Greg Abbott tweeted a link to a Dallas Morning News column about the shooting. He shared the headline: “The outrageous death of Atatiana Jefferson: What was Fort Worth cop possibly thinking when he shot?”

“That’s the key question,” he said in the post.

On Sunday, police said Dean never identified himself as a police officer before he shot Jefferson through a bedroom window. Her 8-year-old nephew, with whom Jefferson had been playing a video game late into the night, was in the room when she was shot. Jefferson died at the scene.

The nephew saw his aunt fall to the floor after she was shot, the family’s attorney said Monday. The boy will begin to undergo counseling this week.

The boy’s mother and one of Jefferson’s older sisters, Amber Carr, said the child has been helping her stay strong since the shooting.

“In the middle of the night when I’m crying, he wakes up and tells me to breathe in my nose and out my mouth. He holds me, he hugs me,” Amber Carr said. “These are the things that I should be doing for him, but he’s not reacting in that manner."

Amber Carr described Jefferson as a doting aunt to her nephews — sometimes people assumed they were Jefferson’s sons.

Protestors gather outside the house (right) where Atatiana Jefferson was shot and killed, during a community vigil for Jefferson on Sunday, Oct. 13, 2019, in Fort Worth, Texas. Jefferson, a 28-year-old black woman, was shot in her home by a white Fort Worth police officer during a welfare check. (Smiley N. Pool / Staff Photographer)

Police were called about 2:30 a.m. to Jefferson’s mother’s home in the 1200 block of East Allen Avenue after a neighbor, James Smith, called a police non-emergency line to report that the doors to the home were open and all the lights were on.

Kraus said that though Jefferson’s neighbor James Smith called a non-emergency number to ask for a welfare check at her home, the officers were not aware of that fact.

The responding officers received information from dispatch about an “open structure” call, which Kraus said requires a more heightened response than a welfare check.

Kraus said officers will typically park down the street and approach with caution when responding to open structure calls. It would be normal for officers to announce themselves on a welfare check, but not if they thought the incident might involve a criminal situation, he said.

Two officers were dispatched to the scene. Body-cam footage shows the officers in the backyard of the home before Dean spins toward a window, shouts at Jefferson to put up her hands and then shoots her through a window — all in a matter of seconds.

Read more: Questions and outrage after Fort Worth officer fatally shoots 28-year-old woman in her home

Police also released a still image of a firearm found in the home where Jefferson was shot. Merritt, the family’s attorney, said that the firearm was legally owned and that Jefferson had a license to carry it.

He criticized the department for releasing the image without context and said it insinuated a “bad act or blame" on Jefferson’s part.

Kraus, the police chief, said that in hindsight, releasing the image of the gun wasn’t the right call.

Mayor Betsy Price, speaking at the police news conference Monday afternoon, said the gun was irrelevant.