Six people died in five days during the past week in officer-involved shootings across Colorado. The unconnected shootings are rare in a state that averages three police shootings a month that often aren’t fatal.

The number of shootings is high, but it’s hard for law enforcement experts to draw any conclusions or see any patterns in the string of fatal officer-involved shootings that started on June 30.

Two involved stolen vehicles. Four involved chases. In five of the incidents, early reports indicate the people who died were armed or had threatened police.

State law requires a shooting by a peace officer that results in injury or death to be investigated by multi-agency teams that include members of at least one other police department, sheriff’s office or the Colorado Bureau of Investigation. Because all the recent incidents are under investigation, few details have been released.

Read more: 2017 Colorado officer-involved shootings

“At the end of the day, it is hard to say this is a trend,” said Mike Violette, executive director of the Colorado State Fraternal Order of Police.

Alamosa Police Chief Duane Oakes, president of the Colorado Association of Chiefs of Police, said police officers are trained to respond when confronted by armed or dangerous suspects.

“When people brandish firearms at police, we are there to protect the communities and to protect people,” he said.

While the incidents must be evaluated individually, the cluster of shootings suggests that more needs to be done to assure force is used only as a last resort by law enforcement officers, said Nathan Woodliff-Stanley, executive director of the ACLU of Colorado.

Every community in the state should have independent mechanisms for police accountability, strict use-of-force policies, and effective training in de-escalation techniques, he said. “We also need more robust collection of data on officer-involved shootings to better inform the conversation about community-police relations.”

Officer-involved shootings Colorado law enforcement agencies reported 259 officer-involved shootings between January 2010 and June 2016. Of those shootings, 116 were fatal, according to a March 2017 report the Colorado Department of Safety’s Division of Criminal Justice prepared for the Judiciary Committees of the state House and Senate.

The spate of shootings frustrates at least one state legislator who wonders what else can be done to reduce the number of fatal encounters between police and suspects.

Colorado has already passed laws to ban choke holds and has increased restrictions, oversight and training of law enforcement officers in the wake of local and national allegations of police abuse.

Both Denver and Aurora police are prohibited from shooting at moving cars unless someone inside is firing at them, policies that mirror those adopted by many police departments nationwide.

An increasing number of police departments across the state now require officers to wear body cameras to hold them accountable for their actions when they interact with citizens. On Friday, the day three of the fatal police shootings occurred, Denver police announced plans to expand body camera use to officers moonlighting at bars, sports events and other off-duty jobs.

“This is what law enforcement deals with every day,” said Democratic state Sen. Rhonda Fields, who is a member of the Senate Judiciary Committee. “I don’t believe anyone goes to work to have this kind of encounter, I believe they come up against life or death decisions,” and must make a difficult decision in a split second, she said.

Still, she finds the high number of fatalities alarming.

“That causes me to pause to get a sense of what is going on,” she said. “What can police do to have a more peaceful outcome so that the end of a conflict we don’t find another dead person?”

The fatal shootings