EVERETT, Wash. -- There's a puzzle on top of a table inside Brandi Castillo's Everett home with a piece missing from the pile. Castillo’s family removed it as a reminder of the hardship that they're enduring -- a piece of their family is missing.
"You have all of the pieces of your life and you know they all fit together and no matter what you do they don’t seem to fit anymore," said Brandi Castillo.
Castillo's 16-year-old son Travin Nelson-Phongphiou was killed three weeks ago in a car crash with his friends.
"It's like somebody took all of the air out of the room. Just nothing makes sense anymore," said Castillo.
Travin was riding in a Kia Sorrento with friends when it slammed into the back of a semi-trailer that was parked the wrong way along Alderwood Mall Parkway. Travin and two of his friends died-- Mikayla Sorenson and the driver, Landon Staley.
A 15-year-old student at Cascade High School was transported to the hospital and she's since been released.
"There's so many questions and none of them will ever get answered," said Castillo.
The crash happened around 4 a.m. in the morning. Landon Staley's Mom previously said that her son was a new driver and snuck out of the house.
The teens drove to Seattle to visit the Space Needle, stopped at McDonalds, then headed back to Snohomish County.
"My hope, really, is just that they were having fun," said Castillo. "I would have been happy even if he was getting in trouble like just if he was having fun because that's horrible to die at 16."
Castillo describes her son as a typical teen -- he loved the trampoline in his backyard and playing basketball with friends.
He was also a family guy-- one of 10 kids.
"Life without Travin is surreal. It's extremely surreal," said Castillo.
Mikayla Sorenson's family has declined interview requests and is asking for privacy.
The 15-year-old girl who survived the crash has not been identified.