CONCORD — A Stratham woman was arrested Friday and charged with stealing $97,000 from a bank customer, state prosecutors said.

Britt K. Landsperger, 46, had worked as a manager at a TD Bank branch and had control of seven different accounts belonging to a 68-year-old person identified only as C.M. in court documents.

The New Hampshire Attorney General’s office and Portsmouth Police Department conducted the joint probe that covered the period of 2013-18, officials said.

Landsperger was charged with seven counts of felony theft by unauthorized taking, each one carrying a prison term of 7½ to 15 years.