Police were still searching this afternoon for a robbery suspect who led Denver police on a chase that ended with a school tutor in the hospital.

The FBI is offering a "significant" reward today to help them find Manuel Santistevan, 26, an alleged member of the "hooded safe bandits" gang responsible for more than 20 armed robberies of restaurants, coffee shots and video stores in the Denver area. The FBI declined to cite the reward amount.

Edith Mack was in fair condition with a broken pelvis today at St. Anthony Central Hospital after an undercover Denver detective in an unmarked pickup truck slammed into her sedan Wednesday afternoon in Lakewood. She ended up hanging upside down in her overturned vehicle.

Police are reviewing whether the pursuit complied with department policy, said Denver Detective John White.

"These undercover officers were pursuing, doing everything they could to keep this extremely dangerous suspect in sight while at the same time trying to get marked units in to assist with the stop," White said.

The detective was working with the Rocky Mountain Safe Streets Task Force, which includes the FBI and Denver and Aurora police. The bandits gang was named for the members' practice of wearing hoods and masks in robberies where they brazenly brandish guns and demand access to a merchant's safe, said FBI spokesperson Rene A. Vonder Haar.

The gang is dangerous, she said. "That's why we want to get them off the street."

Mack has been a tutor in English as a second language for seven years at Jefferson County's Molholm Elementary School, according to the school Web site. She declined an interview request today through St. Anthony Central Hospital spokeswoman Bev Lilly.

This was the second time in five days that a police pursuit of the robber gang ended with the injury of an innocent motorist.

On Friday, Westminster police chased men suspected of robbing an Arby's into Denver, where the suspects' car crashed into city truck near the Auraria campus, White said.

One man was arrested and another escaped. The truck driver was hospitalized.

The incident Wednesday began at 3:40 p.m., when a task force undercover team, including FBI agents, were staking out a home in the 200 block of South Zenobia Street. Santistevan and an unidentified woman were seen leaving the house in a white sedan, prompting officers to pursue them.

"When they were pursuing the suspect, they were calling for marked units to assist them," White said.

White did not know whether the undercover pickup involved in the crash was equipped with lights and sirens.

The accident happened at the intersection of Ninth Avenue and Gray Street in a residential area of Lakewood.

Jacki Dickman, 32, who lives on the southeast corner of the intersection, heard the collision.

"There was this screeching of tires and a hard crash," she said. "I came out, and the officer was out of his truck."

Dickman said she saw the officer's black truck pointed south. She saw the tutor's vehicle upside down on the street, with Mack still inside.

"She was just hanging there," Dickman said. The officer "went up to the car to help her."

Dickman said she saw Denver police officers, members of the Safe Streets Task Force and Joan Chavez, principal of Molholm Elementary, at the scene soon after the accident.

Anyone with information about Santistevan can call Denver Crime Stoppers at 720-913-STOP or the Safe Streets Task Force at 303-629-7171.