Hundreds of people gathered at a Minnesota golf course at dusk to remember a 17-year-old boy who was fatally stabbed during a recreational tubing trip on a Wisconsin river.

Family and friends said Isaac Schuman loved many things, including golf. Many who came for Wednesday's candlelight vigil at Oak Glen Golf Course in Stillwater wore orange, the teen's favorite color.

Friends from Stillwater High School, where Schuman was to have been a senior this year, were among about 500 attending the vigil. They described the teen as kind and compassionate.

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Schuman was part of a group tubing on the Apple River in western Wisconsin's St. Croix County on Saturday when a confrontation occurred with a man who is facing criminal charges as a result of the encounter. Schuman was killed and four others in his group were injured.

Alyssa Lord, 17, is consoled by a friend during a candlelight vigil

Alyssa Lord, 17, is consoled by a friend during a candlelight vigil for her boyfriend, Isaac Schuman, on the 14th green of the Oak Glen Country Club in Stillwater, Minnesota on Wednesday. Schuman, 17, was killed during a confrontation while tubing on the Apple River near Somerset, Wisconsin. (John Autey/Pioneer Press via AP)

His brother, Jake Schuman, spoke at the gathering and thanked his sibling for "the best 17 years of our life."

He told the crowd that he hoped they would keep Isaac’s spirit with them and love others as his brother had.

"Answer a phone call, answer a text message, go see somebody," he said. "Because life is too short."

Isaac’s mother, Alina Hernandez, said that everyone who knew her son "knew the force of his presence," the St. Paul Pioneer Press reported.

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"He is all that was good, kind, giving and forgiving," she said. "He had a style all his own, an incredible work ethic and a smile he shared equally. I know Isaac can’t come back to me physically, but with his spirit I will always feel him with me. I pray every day he will guide me to forgive, to have his kindness, have his tender heart and the generous spirit of love and patience."

Nicolae Miu, 52, of Prior Lake, Minnesota, was charged Monday with first-degree intentional homicide and four counts of attempted first-degree intentional homicide. Witnesses told authorities that Miu had been bothering young women and girls tubing on the river while wearing a snorkel mask.

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Miu told investigators he was trying to defend himself after he was attacked while searching for a lost cellphone.