(CNN) -- So-called "affluenza" teen Ethan Couch and his mother have been detained by Mexican authorities near a popular Pacific resort town, officials briefed on the matter told CNN. 
       Couch, 18, went missing earlier this month in Texas where he was under probation for a 2013 drunk driving crash that killed four people and drew nationwide attention over his lawyers' use of his privileged upbringing as part of their defense at trial.
       He and his mother were detained near the Mexican beach resort of Puerto Vallarta, roughly 950 miles from home, officials told CNN on Monday. 
      The teenager is expected to be turned over to the U.S. Marshals Service, which has spent weeks searching for him. A spokesman for the service declined to comment Monday.
      Couch is wanted by authorities in Tarrant County, Texas, for allegedly violating his probation. His mother, Tonya, was listed by Texas authorities as a missing person after her son's disappearance, and the authorities said they believed she was assisting him.
Victim's husband on 'affluenza' sentence
04:09 - Source: CNN

Story highlights

A teenager drove drunk and killed four people, injured two

Settlement involves Sergio Molina, one of those injured

It includes a cash sum plus periodic payments

CNN  — 

The family of a teen critically injured when another teen, Ethan Couch, drove drunk last year has reached a settlement of more than $2 million.

The case made national headlines after a witness claimed Couch was a victim of “affluenza” – the product of wealthy, privileged parents who never set limits for the Texas boy.

For the crimes of driving drunk and causing a crash – which killed four people and critically injured two – Couch received no jail time. He was ordered to go to a lockdown treatment facility and sentenced to 10 years’ probation.

The settlement, reached this month, involves the case of Sergio Molina, who was riding in the back of Couch’s truck the night of the accident. He suffered a brain injury and can no longer speak, or move. He is considered minimally responsive.

“They told us that, basically, that’s as much as he’s going to rehabilitate,” Sergio’s brother, Alex Lemus, told CNN last year.

In the six months since the accident, which took place in June, Lemus said medical bills had already topped $1 million.

The family filed the lawsuit against the Couch family and the father’s company because Ethan was driving a company-owned truck.

The settlement includes a cash sum of more than $1 million, plus periodic payments, according to documents from the 96th District Court in Tarrant County. Most of the payment will be made by a liability insurer.

An attorney for the Molina family declined to comment.

Earlier this year, a lawyer representing Couch, who was 16 at the time of the wreck last June, lashed out at the news media for their focus on the use of “affluenza” to describe the boy’s privileged upbringing.

Of the two experts who testified in defense of the boy, only one used the word and he used it just once, attorney Reagan Wynn told CNN’s “New Day.”

“That term was not used by either of the lawyers that represented Mr. Couch, and it was not our defense, simply put,” said Wynn.

Last June, Hollie Boyles, and daughter, Shelby, left their home to help Breanna Mitchell, whose SUV had broken down. Brian Jennings, a youth pastor, was driving past and also stopped to help.

All four were killed when Couch’s pickup truck plowed into the pedestrians on a road in Burleson, south of Fort Worth. The vehicle also struck a parked car, which then slid into another vehicle headed in the opposite direction.

Two people riding in the bed of the pickup, including Sergio Molina, were injured.

According to prosecutors, three hours after the crash, tests showed Ethan had a blood alcohol content of 0.24, three times the legal limit.

Lawyer blasts media for ‘affluenza’ focus

CNN’s Gary Tuchman and Tom Watkins contributed to this report.