It was the latest development in the case, in which someone opened fire through a window of the crowded community center next door to Pacific's city hall Friday night, killing 21-year-old Shiloh Drott of Pacific in cold blood in front of his friends.

Shiloh Drott

But after further investigation, police now believe that Drott was not involved in the argument, Hildreth told KOMO News late Sunday.

Instead, it appears that the shooter or one of his friends got into an argument with someone else at Giu's Market, and that disrespect was shown by that person.

"It involved the shooter and other people - not Shiloh," Hildreth said.

After the argument, the gunman came back and opened fire through the window of the community center, at 100 3rd Avenue SE, at around 9 p.m.

Hildreth said it appears the gunman believed the person he argued with was inside at a youth night event sponsored by a local church, Hildreth said.

"He may have been targeting someone else, but I don't know who," he said.

Police aren't revealing why the confrontation escalated to the point that someone got killed. But Hildreth said it is becoming clear that Drott was not targeted and happened to be "in the wrong place at the wrong time."

Drott was well-known and well-liked in the small town of Pacific, where he grew up and was considered a mentor to teens in the community.

A memorial sprang up near the scene of the deadly shooting a short time after it happened, and has become a focal point for the shell-shocked community since then. A candlelight vigil was held there Saturday night, and people have continued to gather there.

Drott and his friends had just finished a basketball game and were about to eat pizza when he was gunned down in cold blood in front of his friends and other young people - including some children as young as 4 or 5 years old.

"He was like, sitting in his chair. He was like, "What's going on?" And another bullet came and hit him, he just fell on the ground," says 11-year-old Kaleb Shoute, who was sitting next to Drott when he was shot to death.

An eyewitness, Colin Cruickshank, told KOMO News that he was walking outside the center just before the shooting when he saw a man hiding behind a dumpster outside the center. The man then pulled out a gun and shot through the window.

The suspect then fled to a waiting Jeep with other people inside and sped away from the scene, he said.

Police say the killer fired up to eight times through the window.

Officers arrested the suspected gunman and two other suspects a few blocks from the crime scene. All three are scheduled to appear in court on Monday. Their names have not been released, but two of them reportedly reportedly are 19 years old and the other is 22.

Drott's dad, Roy, all along has said that the gunman was aiming for other kids and shot his son instead. He says his son never looked for trouble.

"He loved basketball. He loved classic cars. Music. He had lots of friends," Roy Drott said. "Doesn't make sense to any of us."

The city of Pacific will have grief counselors talk with the dozens of children who watched a man murdered before their eyes.

Investigators say they have recovered the murder weapon. And they have video from a surveillance camera outside the community center.