UPDATE:

Watertown Police say a homicide that happened Saturday night "was a senseless act of violence that should not have happened."

Police said an argument about a noise complaint led up to 30-year-old Alexis Javier Velazquez to shoot and kill 17-year-old Jayden Harley.

The two did not know each other prior to the altercation, police said.

The incident happened in the street on the 200 block of 4th Avenue SW.

Velazquez was arrested on second degree murder.

Police said Velazquez used .45 caliber handgun. He had been living in the neighborhood with his long-time girlfriend for about a year, police said.

The victim had a high school graduation party earlier in the day at a different residence, police said.

The investigation into the incident in ongoing.

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The Watertown Police Department says it has arrested a man who shot and killed a teenager Saturday night.

Police said 30-year-old Alexis Javier Velazquez of Watertown was arrested at the scene for second degree murder, and was booked at the Codington County Detention Center.

His bond has been set at $50,00 cash only.

The Watertown Police Department received a report of a neighbor dispute on the 200 block of 4th Avenue SW just before 9 p.m.

Police said Velazquez got into a verbal argument with the victim, 17-year-old Jayden Harley, that reportedly led to him brandishing a handgun.

He allegedly fired one shot at Harley, who was taken to Prairie Lakes Hospital and later died from his injuries, police said.

The investigation is ongoing. A press conference has been scheduled to take place at 1 p.m. Sunday at the police department.

Watertown Police said Jayden’s family released his name to avoid any rumors, and ask for privacy during this difficult time.

Police were assisted by The South Dakota Division Criminal Investigation, the South Dakota Highway Patrol, the Codington County Sheriff’s Office, and the Codington County Dive Team.

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ORIGINAL STORY:

Authorities in Watertown began conducting a large investigation near 3rd St. SW and 4th Avenue SW Saturday night.

The Watertown Police Department and the Codington County Sheriffs Department were not able to provide any details Saturday night, but officers from both agencies were stationed at the active scene around 9:00 p.m. Saturday.

KSFY does not have any other official details at this time, but we hope to learn more from authorities soon.