A man, his girlfriend and his mother have pleaded guilty in the theft of about $8.4 million from an armored car company where he worked near Youngstown.

Twenty-three-year-old Roger Dillon changed his plea Friday in U.S. District Court in Akron. So did 25-year-old Nicole Boyd.

The FBI says the theft at AT Systems was timed so that large amounts of money would be available after the busy post-Thanksgiving holiday shopping weekend. Dillon has said in court documents that he stole the cash and checks from a company building using another employee's security code.

Dillon's mother, 49-year-old Sharon Lee Gregory, pleaded guilty to charges that she helped take the money across state lines.

The money was found in a mobile home in Pipestem, W.Va. Investigators have said that all but $3,500 was recovered.