SAN DIEGO (KGTV) -- A deadly hit-and-run mystery continues to deepen.
"A lot of emotions. Anger, hurt, tore up," said Tanya Darby, choking back tears.
Darby's 20-year-old brother Joseph was found dead in the fast lane of westbound Highway 94 - just east of the 30th street exit at around 2 a.m. on Tuesday.
The driver who hit him had taken off. Parts from a newer model gray Volkswagon were scattered nearby. The search for the driver is part of a growing mystery.
"Things just don't add up," said Darby. "Joseph was in an area he doesn't frequent."
Tanya says her brother had called a friend asking for a ride home to Lakeside from Santee. His friend told him he could if Joseph got a little closer to Lakeside.
Joseph's body was found about two hours later.
Nearby was an older Honda, its door open with a fluid trail leading up the car. California Highway Patrol officers say the fluid trail is connected to the case but declined to say how.
If you have information on the case, call (619) 220-5492.