In 50 weeks, 38 officers have been shot and killed in the line of duty in 2019.
The manner of the deaths doesn't follow any pattern, said Robyn Small with the National Law Enforcement Officers Memorial Fund. Some officers died responding to robberies or domestic disturbances. Others were ambushed.
Overall, that's less than last year -- 47 officers were gunned down by the end of 2018, according to the National Law Enforcement Officers Memorial Fund.
"While we're pleased to see the number of officer line-of-duty deaths has decreased so far this year, even one officer death is too many," Small said.
Here's a list of the officers who've been gunned down while on duty in the US in 2019.
The parameters CNN followed in this count are:
• The officer was fatally shot this year.
• The officer was on duty at the time of the shooting.
• The officer did not die by friendly fire.
Jersey City (New Jersey) Police Detective Joseph Seals
Details are still emerging about a shooting in Jersey City, but authorities confirmed Detective Joseph Seals was killed in the gunfire. He was a 15-year veteran of the department and worked in the anti-violence unit, police said.
Houston Police Sgt. Christopher Brewster
Sergeant Chris Brewster, 32, was shot and killed while responding to a domestic disturbance call. He is survived by his wife, parents and sisters.
Huntsville (Alabama) Police Agent Billy Fred Clardy III
Agent Billy Fred Clardy III, 48, was shot and killed responding to a drug investigation. A "known offender" was set to drop off a large amount of drugs to the undercover agent before opening fire upon Clardy's arrival, police said.
Lowndes County (Alabama) Sheriff John Williams
Sheriff John Williams, 62, was gunned down during a call to a nearby gas station. He spent more than 40 years in public safety, including 19 years as Lowndes County sheriff before his death.
Detroit Police Officer Rasheen McClain
Officer Rasheen McClain, 46, was shot and killed by a gunman accused of invading a home in Detroit. Police believe the suspect had tactical training before opening fire on McClain, a 16-year law enforcement veteran.
Richmond County (Georgia) Sheriff's Office Investigator Cecil Ridley
Investigator Cecil Ridley, 51, was on routine patrol when a suspect shot him outside of a convenience store in Augusta, CNN affiliate WFXG reported. Hundreds attended his two-hour funeral.
Dayton (Ohio) Police Detective Jorge DelRio
Detective Jorge DelRio, 55, was shot in the face while serving a drug-related search warrant. He succumbed to his injuries three days later. He'd worked as a DEA task force officer since 2000.
El Dorado (California) Deputy Sheriff Brian Ishmael
Deputy Sheriff Brian Ishmael, 37, was killed while responding to a report of marijuana theft. An off-deputy officer on a ride along with him was shot, too, but survived.
Harris County (Texas) Deputy Sheriff Sandeep Dhaliwal
Deputy Sandeep Dhaliwal was killed when a suspect shot him in the back of the head during a traffic stop. The first Sikh deputy in Harris County, Dhaliwal made history in 2015 when the department allowed him to wear a turban in uniform. He was beloved by the Houston community he served.
Mandeville (Louisiana) Police Captain Vincent "Vinny" Liberto, Jr.
Capt. Vincent Liberto, 58, was killed when a routine traffic stop ended in a shootout. Liberto left behind a wife and seven children, many of whom are active members of law enforcement and the military, the department said.
Tuscaloosa (Alabama) Police Officer Dornell Cousette
Officer Dornell Cousette, 40, was attempting to arrest a 20-year-old suspect on multiple felony warrants when the suspect shot and killed him. Cousette had served the department for more than 13 years.
Texas Highway Patrol Officer Moises Sanchez
Officer Moises Sanchez succumbed to gunshot wounds he sustained in April, when a suspect in a car crash he responded to fled and shot him in Edinburg, Texas, CNN affiliate KTVT reported. He previously served in the US Marine Corps.