Ethan Couch was driving drunk and speeding near in June 2013 when he crashed into a disabled SUV, killing four people and injuring several others, including passengers in his pickup truck.
Tonya Couch, 48, appeared for an extradition hearing in downtown Los Angeles, where she was flown last week after being deported from Mexico.
Tonya Couch and her son Ethan were taken into custody this week in Mexico.
Ethan Couch and his mother, Tonya Couch stayed first at a resort known as Los Tules, near the beach.
During the sentencing phase of his trial, a defense expert argued that his wealthy parents coddled him into a sense of irresponsibility - a condition the expert termed "affluenza."
Ethan Couch, 18, had been a fugitive after breaking his probation sentence for killing four people while driving drunk. He was arrested in Puerto Vallarta.
The burned remains of the mother and her children were found inside the simple wooden home.
According to entertainment reporter Shanik Berman, Dulce Canseco passed away in Mexico City at 3:30 pm.
Anastasia Lechtchenko, who allegedly murdered and dismembered her mother and sister in Tijuana, said that she was tortured and raped to confess the crime.
Anastasia Lechtchenko Masney claims to have been abused by Public Prosecutor's staff.