The sister of Officer Luis Huesca is pleading with the public to help investigators identify and catch a suspect who allegedly gunned him down.

Four members of law enforcement were shot and killed and four were wounded while they attempted to serve two warrants in Charlotte, North Carolina, police said Monday.

Hoping for a break in the homicide investigation of Chicago police Officer Luis Huesca, investigators have released security video of a person of interest.

A Chicago police officer, who was gunned down Sunday outside his home after returning from his shift, had his gun taken from him as well as his car in the attack.

The teen, Valentina Orellana Peralta, was struck by the stray bullet while Christmas shopping with her mother in North Hollywood on Dec. 23, 2021.

A sheriff's deputy and a police officer have died after shots were fired as they investigated a suspicious vehicle in Salina, New York.

Body camera footage released by the City of Akron on Monday shows the shooting of a teen, who was reported to 911 for holding what was later determined to be a toy gun.

A suspect remains at large after a New Mexico State Police officer was shot and killed on Interstate 40, authorities said Friday.

Houston police on Monday released graphic footage from security and police body cameras that showed the Feb. 11 shooting inside Joel Osteen's church.

LAPD Chief Michel Moore told the Police Commission last week he had "concerns relative to the actions of the officer involved."

The woman’s attorney called the incident evidence of "unnecessary and excessive force."

The remains of all six members of the Le family have been recovered, Delaware County District Attorney Jack Stollsteimer said in a press conference Friday.

A suspect in a hostage incident at a Florida bank was shot and killed by a SWAT sniper, and the two hostages were unharmed, authorities said.

Three New Mexico police officers involved in the fatal shooting of Robert Dotson while responding to the wrong home's address will not be charged.

A Minnesota State Patrol trooper was charged in connection to the death of 33-year-old Ricky Cobb II, who was shot and killed during a routine traffic stop in July.

The number of officers shot and killed was down 25%.

Niani Finlayson, 27, was shot and killed after making a domestic violence call.

Indianola Police Sgt. Greg Capers is speaking out after a grand jury cleared him in the shooting of an unarmed 11-year-old boy inside his home.

A gun-wielding suspect was killed and three bystanders were injured in a police-involved shooting in downtown Austin, Texas, authorities said.

Jeremy Cooper and Peter Cichuniec were the Aurora Fire and Rescue paramedics who injected McClain with 500 milligrams (mg) of ketamine on Aug. 24, 2019.

Officers involved in Jayland Walker's death have been cleared of departmental policy and procedural wrongdoing.

An off-duty U.S. Park Police officer was arrested Sunday and charged in the fatal shooting of a colleague inside a McLean, Virginia, apartment, authorities said.

The Camden County, Georgia, Sheriff's Office has released the dashboard camera and body camera footage of the fatal police shooting of 53-year-old Leonard Allan Cure.

The second trial in connection with the death of 23-year-old Elijah McClain following an altercation with Aurora, Colorado, police began Tuesday.

The jury has convicted one officer in the first trial connected to 2019 death of 23-year-old Elijah McClain.

Three Philadelphia police officers were shot Wednesday night while responding to a 911 call about a shooting at a home, officials said.

Deputy Ryan Clinkunbroomer, 30, was "shot in his patrol car," law enforcement officials said.

Nadine Young, the grandmother of the pregnant woman shot by Ohio police last month, speaks with ABC News Live.

The Philadelphia police officer who shot and killed a man sitting in his car last month surrendered to authorities Friday morning on murder charges.

Blendon Township police released video showing one of its officers fatally shooting a woman who accelerated her car towards the officer after allegedly stealing.

Two officers were injured on Friday in Orlando, Florida, after stopping a vehicle allegedly connected to a Miami homicide, police said.

Former Columbus, Ohio, police officer Ricky Anderson has been indicted on charges of murder and reckless homicide.

Police in Fargo, North Dakota, say one of their own was killed in a shooting Friday, an incident that also critically injured two other officers and two civilians.

As a Texas grand jury declined to indict the police officer who killed a mass shooter in May, authorities released body camera video of the incident.

Jayland Walker's family has filed a lawsuit against the city of Akron and members of the Akron Police Department.

Police in Colorado have released graphic body camera footage after an officer fatally shot a teenager following an alleged convenience store robbery.

Sgt. Cory Maynard was fatally wounded, according to West Virginia Gov. Jim Justice.

Ken Featherstone, the mayor of Indianola, Mississippi, urged his community to "trust the process" amid a probe into the police shooting of 11 year-old Aderrien Murry.

Aderrien Murry, the 11 year-old boy who was shot by police after calling 911, spoke out about the harrowing experience in an exclusive interview with ABC News.