Lawyer Leonard Ressler said the teen was sent to live with a family friend days before the crash after he fought with his momom and refused to take his anti-psychotic meds.
Teen driver who killed Queens couple in crash concerned about his car
The Mercedes belonged to the family and Chubalashvili took it without permission, prosecutors said.
Ressler also said the intersection is an accident-prone site with a lot of blind spots.
Chubalashvili has two other open criminal cases, one for robbing a pre-teen in a playground, and the other for turnstile jumping, prosecutors said.
In the robbery case, Chubalashvili and two pals allegedly attacked a pair of youngsters at a Rego Park playground.
Co-defendants Michael Sarikov and Rabiyev Merikhay beat the boys and stole a cellphone, then Chubalaskvili forced one of the boys to go home and retrieve $200 for them, prosecutors said.
Chublakashvili was born in the U.S., but descends from the Republic of Georgia, near Russia.
"Russians don't cry, Russians get even," Sarikov warned the victims, threatening a worse beating if they went to cops.