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A memorial surrounds a tree in Antioch, Calif., on Sunday, Sept. 15, 2013. On Friday night, a car in which Lydell Benjamin was riding crashed into the tree, killing the Deer Valley High School senior and injuring the 19-year-old driver. (Courtesy of Natalie Gutierrez)

ANTIOCH -- While the Deer Valley High School community continues to mourn the loss of a well-liked and popular senior, more details are emerging about the fatal car crash Friday that killed Lydell Benjamin.

A large group of friends, classmates and some family members gathered at a candlelight vigil Saturday night at the crash scene at Sterling Hill Drive and Hillcrest Avenue to remember the gregarious senior. Condolences were also pouring out via Twitter and Facebook, remembering Benjamin's laugh and sense of humor.

Police responded to the wreck at the southeast Antioch intersection about 7:10 p.m. Friday, finding a silver Jaguar sedan had hit a tree, ejecting two people.

On Saturday, police were contacted by the 18-year-old driver of a second vehicle involved in the crash, who is cooperating with investigators, Lt. John VanderKlugt said.

There are no signs the vehicles collided, but both had been traveling at a speed in excess of the posted limit, police said.

Benjamin, a passenger in the Jaguar, was declared dead at the scene. The driver, a 19-year-old Antioch resident, was flown to John Muir Medical Center in Walnut Creek, where he underwent surgery late Friday for major injuries.

The driver's condition was said to be "serious" late Saturday, according to Antioch police. Alcohol has not been determined to be a factor in the collision.

VanderKlugt, who was at the scene for some time, said the damage to the vehicle was "extremely extensive."

Police are not naming any of the parties involved because the investigation is ongoing.

Deer Valley Principal Ken Gardner also confirmed Benjamin's death and said the senior was popular among the school's staff and his fellow students.

School administrators are preparing for a tough day Monday, and grief counselors will be on the campus all day, he said.

Former Antioch Unified School District board member Walter Ruehlig said that stretch of Hillcrest Avenue is a notorious site for speeding and accidents, and he has warned his grandson -- who lives nearby and just got his driver's license -- to drive there with caution.

"I travel it every day to and from work, and it's really something," Ruehlig said. "If you're going the speed limit, people are nudging at you from behind and looking at you like you're crazy."

Ruehlig noted that a girl was struck and killed by a car while crossing a nearby intersection on Hillcrest in February. Police at the time said speed did not appear to be a factor in the death of Black Diamond Middle School student Hasanati White, 14.

Anyone with information about Friday's crash is encouraged to call Antioch police at 925-778-2441.

Staff writer Josh Richman contributed to this story. Follow Paul Burgarino at Twitter.com/paulburgarino and Katie Nelson at Twitter.com/katienelson210.