updated 09/02/2014 AT 2:05 PM ET
•originally published 09/02/2014 AT 4:15 PM ET
Connecticut officials examined a school bus company’s records after one of its drivers was charged with driving drunk with 20 children on her bus, and authorities learned the woman had been arrested before on a DUI charge.
Department of Motor Vehicles inspectors went to the M & J Bus Co. on Thursday. The New Britain Herald reports the DMV questions whether there was a proper background check on the driver.
Police say they arrested 44-year-old Tammy Costello on Wednesday morning after she dropped the children off at a Farmington school.
M & J officials say Costello’s 2004 DUI arrest wasn’t on her driving record.
DMV officials say records show Costello entered an education program that results in charges being erased after the 2004 arrest.
Costello didn’t return a phone message Friday.