Banker's Alibi (Cybil Quindt Mystery Book 2)

However, days after Cybil begins at the bank, one of the other
tellers is found dead. The authorities rule the death a suicide but when
Cybil is assigned to deal with the dead woman's estate, the investigator
uncovers secrets which contradict the official verdict. Cybil suspects
foul play and once again throws herself into an investigation marked by
blackmail, murder, and mayhem.