[email protected] (661) 267-7802 A seven-month investigation that led to the arrest of a Lancaster used-car dealer accused of defrauding customers of more than $500,000 fizzled when prosecutors rejected the case. The District Attorney’s Office, however, left the door open in the case against 44-year-old Isaac Thanawalla, arrested earlier this month on suspicion of felony grand theft auto. D.A. spokeswoman Jane Robison said prosecutors “rejected the case for further investigation.” The state Department of Motor Vehicles alleges Thanawalla failed to pay transfer and title fees on vehicles sold to customers for which he had taken out loans to purchase, Miller said. 160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set!