PUEBLO, Colo. -- New charges were filed against the Dougherty siblings Friday morning by Huerfano County because their officers were involved in the pursuit and capture.

Lee Grace Dougherty, Ryan Dougherty and Dylan Dougherty Stanley appeared in a Pueblo County courtroom on Friday to hear the additional charges.

All three were slapped with an additional set of charges of assault -- threatening a peace officer with a weapon -- and attempted homicide on a peace officer. Those are the same charges they face in Pueblo County.

The 20-mile chase started in Pueblo County and ended in Huerfano County. The trio are accused of firing several AK-47 rounds at three Colorado State Patrol cars and a Pueblo County Sheriff's car during the high-speed pursuit on southbound Interstate 25.

Troopers said during the pursuit, which at times exceeded 120 mph, they could hear gunfire and could see "a weapon being fired out of the right side of the car," according to the arrest affidavit.

The chase ended when spike sticks were deployed, causing the Doughertys' car tires to deflate, sending the Subaru rolling and crashing into a guardrail.

Dylan Dougherty stayed in the car and was arrested. Ryan Dougherty ran off and was eventually detained by construction workers working at a nearby site, authorities said.

Lee Grace Dougherty scrambled out and was going over a guardrail with a machine pistol in her hand when Walsenburg Police Chief James Chamberlain ordered her to drop her weapon, according to the affidavit.

She was seen trying to "work the action on the pistol" and pointed her weapon directly at him, the affidavit said.

That's when Chamberlain fired his .40 caliber weapon and struck her in the right upper thigh, causing her to fall to the ground.

"We weren't trying to hurt anyone. We just wanted them to get back," Lee Grace Dougherty told authorities after her arrest. Police inserted a note in the affidavit that they never fired at the Doughertys' car during the chase.

Authorities eventually recovered a MAC-11 machine pistol, two AK-47 assault rifles and a handgun from the Doughertys, according to the affidavit.

On Friday, law enforcement officers began a concentrated search along the shoulders of southbound I-25 between mile markers 68 to 65, looking for evidence connected to the chase. CSP Trooper Heather Cobler said the officers were looking for evidence such as shell casings from the chase.

The three Dougherty siblings are being held on $1.25 million bond each.

Lee Grace Dougherty's boyfriend told ABC News that she called him from jail and told him to bail out her brothers first.

7NEWS tried to talk with the public defender who will be representing the siblings, but William Martinez wouldn't say much.

The Dougherty gang is also facing charges in Florida and Georgia. They had been on the run since Aug. 2.

Tip From Retired Officers Led Break In Case

A crucial tip that led to the arrests of three fugitive siblings in Colorado came from two retired officers, one a former state trooper and the other a former wildlife officer, authorities said.

The pair were taking a leisure trip in the San Isabel National Forest Wednesday morning when they spotted the siblings somewhere near Colorado City, said Colorado Department of Public Safety spokesman Lance Clem.

The retired trooper knew the number of a State Patrol dispatch center in Pueblo and called in the sighting. His report was quickly broadcast to law-enforcement officers, and within an hour the fugitives were in custody after a high-speed chase, gunfire and a crash.

"If you're the bad guys, you don't really want to encounter some retired officers because you're in for a bad day," Clem said.

Colorado authorities first learned the fugitives might be in their state on Tuesday, when an FBI agent told the Colorado Intelligence Analysis Center the siblings might have purchased camping gear at a Colorado Springs store.

The Colorado Intelligence Analysis Center is a state homeland security agency established after the 2001 terrorist attacks. At the FBI's request, the center distributed a bulletin about the fugitives to Colorado law-enforcement officers and other state and federal officials, Clem said.

News media outlets were also notified, and at least one of the retired officers heard the media reports, Clem said.

Clem wasn't sure exactly where the retired officers saw the fugitives, but it was believed to be near the small town of Colorado City.

The reported sighting was broadcast to state troopers and others shortly after 9 a.m., and four state troopers began heading that way, according to a court document and interviews with Clem and other officials.