Story highlights "Affluenza" teen "was as compliant and as docile as anyone we have ever seen," sheriff says

Ethan Couch got probation, not jail time, after being convicted for killing 4 while driving drunk at age 16

He and his mother ended up in Mexico; they were caught in late December

Fort Worth, Texas (CNN) "Affluenza" teen Ethan Couch, convicted in a fatal 2013 drunken-driving accident, is in the custody of Texas juvenile authorities after being deported and put on a flight out of Mexico City on Thursday, Tarrant County Sheriff Dee Anderson said.

Couch seemed "fine" and "in good health," the sheriff said.

"He was very calm. He was very quiet, very passive, not at all argumentative or resistant. He followed every direction. His only request is he was hungry and wanted something to eat," Anderson said. "He was as compliant and as docile as anyone we have ever seen coming into a facility."

Couch landed in Dallas before noon and is scheduled to attend a detention hearing Friday because the law requires a hearing within 24 hours, the sheriff said. Couch was scheduled to be medically screened and assigned to a housing unit at Tarrant County Juvenile Detention Center, he said.

"We hope justice can now be served for those four victims and their families," Anderson said.