OREM, Utah — Less than two weeks before Charlie Kirk's killing in Utah, a sheriff's department in central California conducted three days of reconnaissance to prepare for a speech by the conservative firebrand at a local church in politically friendly territory.
Officials researched potential escape routes and identified local activists opposed to Kirk. On the day of the indoor event in Visalia, which drew 2,000 people, some 60 law enforcement officials monitored Kirk's movements to and from the church, even deploying a drone to secure surrounding rooftops, said Tulare County Sheriff Mike Boudreaux.
"The very nature of Charlie Kirk coming in requires you take special attention to the nuances of what could possibly happen," Boudreaux said. "He's a high profile name and personality. Not only do we have to provide for the safety of people attending, we have to provide for the safety of him."
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Charlie Kirk, conservative activist and founder of Turning Point USA, walks through the crowd Nov. 6, 2020, at a pro Trump rally in Phoenix.Â
By contrast, Kirk's outdoor event at Utah Valley University last week was out in the open, but with far less security. Six campus police officers — about a quarter of the force — worked the event, which drew 3,000 people, said Jeff Long, the campus police chief. The department hasn't said whether they inspected nearby rooftops; the suspect shot and killed Kirk from atop a building hundreds of feet away.
As he crisscrossed the country to spread his conservative ideals at college campuses, Kirk preferred to be as close to students as possible. His level of protection varied greatly — campus police often took the lead on overall security, while Kirk's private detail focused on up-close protection.
His assassination at Utah Valley drew even more attention to the role that campus police departments play in protecting high-profile and divisive political figures who regularly make college visits. Security experts questioned everything from the number of officers deployed to the decision to hold the event outside.
When Kirk spoke at Illinois State University in April, more than a dozen campus police officers patrolled the 700-person crowd, and more officers watched cameras trained on nearby buildings from an operations center. The same month, University of Wyoming police assigned about 15 officers to an indoor Kirk appearance.
In other cases, arrangements were similar to last week's debate in Utah. At an outdoor Michigan State University event, a student organizer with the campus Turning Point USA chapter said there were eight to 10 campus officers. Kirk was founder of Turning Point USA, one of the nation's largest political organizations with chapters on high school and college campuses.

Charlie Kirk hands out hats before speaking Sept. 10Â at Utah Valley University in Orem, Utah.Â
Kirk's own security team of about six people was present at each event.
Outdoor eventsÂ
Security experts told The Associated Press they expect to see more events held indoors to protect against similar attacks, as outdoor events greatly increase vulnerability. College campuses are generally open and accessible, making them extremely susceptible to shootings, said Don Aviv, CEO of the security firm Interfor International.
Without monitoring rooftop access and blocking shooter sightlines, Aviv said, "it doesn't matter how many armed personnel you have ringing the speaker, you would not have been able to protect against a long gun."
The desire by Kirk's team to make him as accessible as possible complicated security planning, said Aaron Woodruff, police chief at Illinois State University.
"It makes it hard to protect somebody when you have people on all sides of him," Woodruff said.
Woodruff ran a security plan past Kirk's team by phone and then did a walk-through on site. Security cameras trained on nearby buildings allowed officials to monitor rooftops and surrounding areas, Woodruff said.
The up-close nature of Kirk's interactions appealed to his followers, said Alex Bitzan, the TPUSA chapter president at Michigan State, who helped organize an April event held on a campus lawn.
"People are drawn to the open conversation. People are drawn to the fact that he's unscripted," Bitzan said. "When you're outside in public like that, I don't see what would solve what happened last Wednesday."

Charlie Kirk, center, conservative activist and founder of Turning Point USA, speaks Nov. 6, 2020, to supporters of President Donald Trump at a rally in Phoenix.Â
Monitoring rooftopsÂ
The attempted assassination of President Donald Trump last year in Butler, Pennsylvania, should have raised concerns about the vulnerability of sniper attacks from nearby rooftops, said James Hamilton, who founded the FBI's close protection school.
"Butler told people it's not that hard to get a rifle, get up on a roof and shoot," Hamilton said.
Private sector security has to make compromises based on clients' desires, said Hamilton, who said it would have been much safer to hold Kirk's events indoors.
A Utah Valley spokesperson did not respond to emailed questions seeking information about security planning, public safety officer assignments and whether rooftops were inspected.
Turning Point USA did not respond to requests for comment about security protocol for Kirk's events.
Photos before and after the shooting of Charlie Kirk

Charlie Kirk hands out hats Wednesday before speaking at Utah Valley University in Orem.

Charlie Kirk speaks Wednesday before he was shot during Turning Point's visit to Utah Valley University in Orem.

The crowd reacts Wednesday after Charlie Kirk, the CEO and co-founder of the conservative youth organization Turning Point USA, was shot at the Utah Valley University in Orem.

The crowd reacts Wednesday after Charlie Kirk was shot during Turning Point's visit to Utah Valley University in Orem.

Law enforcement tapes off an area Wednesday after Charlie Kirk, the CEO and co-founder of the conservative youth organization Turning Point USA, was shot at the Utah Valley University in Orem.

A SWAT team heads onto the Utah Valley University campus Wednesday in Orem after Charlie Kirk was shot during Turning Point's visit.

Armed officers walk around the neighborhood bordering the Utah Valley University campus in Orem, knocking on doors and asking for information, after Charlie Kirk was shot Wednesday during Turning Point's visit to the college.

The national headquarters of Turning Point USA is seen Wednesday in Phoenix after the shooting of Charlie Kirk, the 31-year-old CEO and co-founder of the organization, during a Utah college event.

A well-wisher, front, receives a hug from a member of security Wednesday as he drops off flowers at the national headquarters of Turning Point USA  in Phoenix after the shooting death of Charlie Kirk, the organization's CEO.

A well-wisher is overcome Wednesday after dropping off flowers at the national headquarters of Turning Point USA in Phoenix after the shooting death of Charlie Kirk, the organization's CEO.

A worker lowers the American flag to half-staff Wednesday on the North Lawn at the White House in Washington after Charlie Kirk, the CEO and co-founder of Turning Point USA, was killed in a shooting.

People take photos after the American flag was lowered to half-staff Wednesday on the North Lawn at the White House in Washington after Charlie Kirk, the CEO and co-founder of Turning Point USA, was killed in a shooting.

Speaker of the House Mike Johnson, R-La., speaks to reporters Wednesday at the Capitol in Washington about the shooting of Turning Point USA co-founder and CEO Charlie Kirk.

Flowers are seen Wednesday outside the Keller Building on the Utah Valley University campus after news broke that Charlie Kirk died after he was shot earlier during Turning Point's visit to the university in Orem.

Police arrive at the national headquarters of Turning Point USA in Phoenix shown after the Wednesday shooting death of Charlie Kirk, the organization's co-founder and CEO.

Allison Hemingway-Witty cries Wednesday after Charlie Kirk was shot during Turning Point's visit to Utah Valley University in Orem.

Utah Highway Patrol vehicles park outside Timpanogos Regional Hospital on Wednesday in Orem, Utah.

Joseph Vogl stands outside Timpanogos Regional Hospital on Wednesday in Orem, Utah.

Cecilia Garcia and Dawn Thomas react Wednesday in Westminster, Calif., as they learn the news on social media of conservative activist Charlie Kirk being shot at a college event in Utah.

Police work Wednesday on the Utah Valley University campus in Orem after Charlie Kirk was shot during Turning Point's visit.