SANTA ANA – A man suspected of driving under the influence in a freeway crash that killed a 10-year-old girl on I-405 in Seal Beach on Monday was on probation for a prior DUI conviction, authorities said Wednesday.

Adam Kanas, 36, of San Clemente was charged on Wednesday with one felony count of gross vehicular manslaughter while intoxicated with a prior conviction and three felony counts of driving under the influence of drugs and causing bodily injury.

Prosecutors said Kanas was driving under the influence of cocaine and opiates at 9:20 a.m. Monday when his 2013 Chevy Tahoe swerved left over the double yellow line into the carpool lane and struck the rear of a 2015 Tesla near the Seal Beach Boulevard exit on northbound I-405.

The impact sent the Tesla – carrying 10-year-old Kendra Geddis; her sister Kayla Geddis, 13; and their father, Don Geddis, 49, all of Hillsborough – into the rear of a Honda Civic. Kendra Geddis, who was asleep in the back seat with her sister, was killed. Her father and sister were seriously injured. He was discharged from the hospital, a hospital official said Wednesday evening. Kayla was still in critical condition.

Prosecutors accused Kanas of speeding at up to 80 mph and making unsafe lane changes at the time of the crash. At the time of his arrest, he displayed signs of intoxication, prosecutors said.

Kanas and the driver of the Honda Civic were not hurt.

On Wednesday, Kanas appeared briefly in Orange County Superior Court and pleaded not guilty to the charges. If convicted, he faces a sentence of 41 years to life in prison, said Deputy District Attorney Jennifer Walker.

Court records show that Kanas has a prior conviction for driving under the influence in March 2015 in Los Angeles County. In 2014, he had a prior strike conviction for first-degree burglary in Los Angeles County.

He was sentenced to three years of probation and ordered to complete a three-month, first-time-offender alcohol and drug education program.

He was being held in Orange County Jail in lieu of $1 million bail and was scheduled to appear for a pretrial hearing Aug. 25.

Kendra Geddis was set to start the sixth grade, and her sister is an eighth-grader in the Hillsborough City School District on the San Francisco Peninsula. Their father is president of the school board.

Staff Writer Alma Fausto contributed to this report.

Contact the writer: 714-796-7767 or sschwebke@scng.com