A judge ruled Friday that Ethan Couch -- the infamous "affluenza" Texas teenager who killed four people during a drunk driving accident -- will remain in juvenile detention as he awaits a hearing to determine whether his case will be transferred to adult court.

The 18-year-old returned to the U.S. on Thursday after he and his mother were arrested in Mexico following an extensive manhunt. The two had fled to Mexico in December after a video posted on social media appeared to show the teen engaging in a drinking game. His lawyers say he fled in fear the video would prove he violated the 10-year probation sentence he received at the age of 16 in wake of his fatal car accident in 2013.

During the trial, Couch's attorney's successfully kept him out of prison by arguing that he suffered from a condition called "affluenza," which prohibited the rich, spoiled teen from knowing the difference from right and wrong.

After being transported out of Mexico last week, Couch was booked into a juvenile detention center in Fort Worth, Texas, reports The Associated Press. Prosecutors and the local sheriff had argued that Couch should be kept in an adult jail until his next hearing on Feb. 19. However, Judge Timothy Menikos sided with Couch's attorneys and said the teen would stay at the juvenile center until the hearing.

Meanwhile, relatives of those killed and injured told reporters that Couch is still the same spoiled, rich kid who literally got away with murder.

"Over and over and over again his decisions make it clear that nothing has changed," said Tim McLaughlin, whose teenage son was injured in the crash, at the detention hearing, reports CBS DFW. According to him, Couch should be sent to jail for violating his probation because he needs "a wake-up call."

"I think going away and doing some time would be a reality check for him," he added.

"When you flee the country and you go to Puerto Vallarta, Mexico, and you're living a life like you're a celebrity, you go to clubs and are spending thousands of dollars. That doesn't scream remorse," said McLaughlin.

On the other hand, Couch's defense attorney Scott Brown argued that the teen has changed and is "remorseful" over the fatal crash.

"From day one, we have viewed this as a tragedy," says Brown. "The families that lost their family members: that's a loss that none of us can imagine. And nothing that happens in this courthouse or with any judge, or anything with Ethan is ever going to make them whole again."

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