Authorities say a wrong-way driver who killed himself and two others in a head-on crash on a San Diego County freeway had a history of driving under the influence.

CHP spokesman Jim Bettencourt said Tuesday the driver had three DUI convictions in the county in 2012 and 2013.

Tests will determine whether he had drugs or alcohol in his system during the Sunday morning crash.

The San Diego Union-Tribune (http://bit.ly/1MuwtTt ) says the coroner has identified the driver as 29-year-old David Elmore of Encinitas.

Authorities say his Mercedes made a sudden U-turn after crossing into Mexico then sped north on southbound Interstate 5. Border agents chased the car but lost it.

The Mercedes went some 40 miles and hit 100 mph at times before hitting a car in Solana Beach. Elmore and a man and woman in the other car died.