The mechanic was Gilberto Junior of Junior’s Auto Body in Cambridge.
Thanks!
http://www.star-telegram.com/2013/04/24/4801551/biden-denounces-brothers-as-cowardly.html
Both brothers drove late-model Hondas, said Gilberto Junior, who owns a body shop a block away from their apartment. Dzhokhar Tsarnaev routinely recommended the shop to his friends who drove fancy cars, Junior said, but Dzhokhar was “just the passenger.”