CNN Chief Law Enforcement and Intelligence Analyst John Miller discusses the shooting of Charlie Kirk and the manhunt that has followed on Wednesday.

A manhunt is still underway as law enforcement tries to find the person who fired the shot that killed conservative activist Charlie Kirk today.

According to CNN Chief Law Enforcement and Intelligence Analyst John Miller, the shooter’s planning, skill and execution may be complicating the search.

He told CNN’s Kaitlan Collins that snipers have been studied closely by the government and they typically are people who are “methodical and patient, self-reliant.”

“This is the kind of person who would have planned to get in silently, try to be invisible, take this shot, accomplish the mission, take the gun with them and leave little evidence behind which is why I think they’re having a very difficult time getting started on this.”

Officials said earlier today that they believe the shooter fired one shot at one person and that it was a targeted incident.

The single fired shot shows that “the person is not new to shooting,” Miller said, which ultimately could help officials get to the bottom of the investigation.

“This is someone who knew exactly what they were doing and is probably known to others, and this may be working to the advantage of law enforcement,” Miller said. “As someone who has a long history in shooting, this wasn’t an amateur.”