A bank teller is on trial for embezzling funds from a school parent-teacher association on which he serves. The teller seeks to call his former boss as a witness at the embezzlement trial, who will testify that the teller, on five separate occasions over a two-month period during the previous year, alerted bank customers to errors in their cash deposit slips that saved the customers money. The teller wants to offer this testimony to show his character for truthfulness and does not seek to testify or to offer any further evidence of his good character at trial. Requried:
Explain how teller is making correct decision?