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VACAVILLE, CA - Dozens of people gatheredat Andrews Parkfor avigil held for a teenage girl who was killed in a jet ski collision in Hawaii.

Kristen Fonseca, 16, was riding a rented jet ski near Honolulu. Authorities say she was only going about 10 miles an hour when an Australian tourist slammed into her from behind, going more than 40 miles an hour on his jet ski.

Witnesses say Tyson Dagley, 20, was standing on his seat just before the crash.

"I yelled for him to stop,"Fonseca's stepfather Mario Canton said."I yelled - watch where you're going. Look in front of you. Three seconds after that he hit the back of Kristen's watercraft."

Canton tried rescuing his stepdaughter after seeing the accident.

"Her head hit the steering wheel and then she fell in the water face first."

Dagley is being charged with 3rd degree negligent homicide. He appeared in court Friday wearing a neck brace and told the judge he is very, very sorry for what happened.

However Fonseca's stepfather Mario Canton isn't convinced. "I feel like he isn't sorry for what he did to my child. He is more sorry that he is involved," Canton said.

Dagley's 21 year old girlfriend Natasha Ryan was charged with hindering police after investigators recovered images of the incident that were deleted from her camera. She was released on $500 bail.

Dagley is being held on $100,000 bail and is set to be arraigned on Tuesday.

"That whole time, he was being a showboat on that jet ski," said Canton."It ultimately cost my daughter her life."

By Natalie Sentz, nsentz@news10.net