A Colorado deputy was shot and killed Wednesday night after chasing the suspect of an assault call, according to the Adams County Sheriff's Office.
Gumm had served with the Adam County Sheriff's Office since 2013.
A suspect has been taken into custody, but the search continues for possibly two others, a ranking law enforcement source reports.
Two other suspects were still being sought, and law enforcement said they were considered armed and unsafe. Its introduction points out that "a special PayPal account of the Colorado FOP's Police Foundation has been set up exclusively for donations to the family of Deputy Gumm".
Deputy Zackari Parrish died after a 37-year-old man barricaded himself in a bedroom and fired a rifle, striking several law enforcement officers, officials said. A Douglas County deputy died New Year's Eve during a domestic disturbance in Highlands Ranch.
The Adams County Sheriff's Office says it got a call about the assault just before 7 p.m. and responded to the 8700 block of Dawson Street, which is in a neighborhood just east of Interstate 25 and 88th Avenue.
The shooting is the second in a month to kill a deputy in the Denver area.
The Sheriff's Office says the "area is to be considered risky".
The Sheriff's County tweeted an officer was "down" and advised the people to remain inside and stay away from doors and windows of their homes.
The suspects were described as light-skinned black males or dark-skinned Latino males by the police. When they found someone matching his description, the Adams County Sheriff's Office says he ran from deputies, leading them behind a house.
However, the sheriff's office points out that two additional suspects are being sought.
Immediately after the shooting, the deputy was taken to Denver Health, a Level 1 trauma center that is equipped to deal with serious injuries.
Other residents showed their support for Gumm, other deputies and police in different ways.