Huge update on a mysterious tubing attack that killed one teenager and injured four as a 52-year-old man was arrested after a crucial lead

THE SUSPECT in the mysterious hose shooting that left one dead and four others injured has been named.

Nicolae Miu, 52, has been arrested and charged with first-degree first-degree homicide and four attempted first-degree murders for Saturday’s fatal incident at Wisconsin’s Apple River.

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Mius is accused of stabbing five people on the river, including 17-year-old Isaac Schuman of Stillwater, Minnesota, who died from his injuries.

A Facebook post from Schuman’s father read: “He was in college running his own auto and boat detailing business. He was an all around amazing person and loved by everyone.”

The other victims are a 20-year-old man, a 24-year-old woman and two other men, aged 22.

All four victims were stabbed in the chest and upper body but have since been listed in stable condition. Both 22-year-olds were discharged from the hospital.

According to GoFundMe, the female victim has been identified as Ryhley Mattison, who claims Miu was “inappropriate” before the bloody encounter.

“I’m sure many of you are aware of what happened at the Apple River on Saturday night,” Mattison writes.

“Some friends and I were tubing when we came across a group asking for our help.

“My friends and I walked over to see what was going on and there was an elderly man who was inappropriate and was asked to leave but didn’t want to.

“The older man ended up with a knife and he stabbed some friends of mine and myself.”

Authorities were able to apprehend Miu at the river’s exit after he briefly escaped the scene by “swimming down the Apple River.”

Officials from the St. Croix County Sheriff’s Office are still trying to determine a motive for the stabbing.

Authorities said they didn’t know if Miu knew the victims.

“I’ve never seen anything like this on this scale,” said Sheriff Scott Knudson.

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Cops confirmed Miu was hooking up with a separate group.

The Apple River, which empties into the St. Croix on the Minnesota border, is a popular destination for floaters.

However, officials have long struggled to curb some of the more disruptive behavior on the river, including public drunkenness and nudity.

Rivers Edge, which offers tubes for river swimmers, said in a Facebook post that it will reopen Monday after the incident, which the company described as “difficult and tragic.”

“For more than half a century, the Apple River has been known for its beautiful setting and summertime fun. Tens of thousands of visitors annually – millions in total – have enjoyed swimming on the river with family and friends,” the company said.

“Yesterday an act of violence shook that serenity. The River’s Edge family is saddened by this senseless act and our hearts go out to those affected and their families and friends.”

A judge set Mius’ bail at $1 million.