Tonya Couch was photographed being taken away in handcuffs by U.S. Marshals after landing at Los Angeles International Airport early Thursday morning.
"We are holding her in our metropolitan detention center in downtown Los Angeles until Texas authorities pick her up," LAPD Officer Norma Eisenman tells PEOPLE. "It is a courtesy hold for Texas."
Jalisco St. Prosecutors Office
Tonya, 38, faces a felony charge of hindering apprehension of a felon for allegedly helping her 18-year-old son flee the country while out on probation.
Tarrant County sheriff spokesperson Terry Grisham tells PEOPLE that if convicted, Tonya faces a maximum of 10 years in prison. Her bail has been set at $1 million. Grisham says Tonya will be escorted back to Texas by "experienced Texas police officers."
"We will be happy to pick her up and will get there as soon as we can," Grisham says.
Tonya and her son were both detained in Mexico on Monday after authorities tracked a phone call to Domino's Pizza to the Puerto Vallarta apartment where they were hiding. Grisham says the duo drove across the border into Mexico.
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Ethan was convicted of killing four people in a 2013 drunk driving crash but avoided jail time based on the argument that his wealthy upbringing made him incapable of understanding the consequences of his crime. The decision sparked widespread outrage.
AP Photo / Mark J. Terrill
"That, in my opinion, is not a sufficient punishment for the taking of four lives," she said at a news conference this week.
As for Ethan's whereabouts, his Texas attorneys released a statement saying they helped him find a lawyer in Mexico as well.
"Late yesterday afternoon, the attorney who has been retained to represent Ethan in court proceedings in Mexico provided us with information indicating that a Mexican Federal Judge has granted an injunction and stay of all proceedings," Scott Brown and Wm. Reagan Wynn said Wednesday afternoon. "We believe this means Ethan will remain where he is until the Mexican Federal Judge ascertains whether or not Ethan's rights are, or potentially will be, violated. Accordingly, we believe that, until the Mexican Federal Judge enters an appropriate order authorizing it, Ethan will not be returned to the United States. We are uncertain how long the legal process in Mexico will take or how it will ultimately be resolved. Therefore, we are not in a position to make any additional statements concerning this matter at this time."