Rosalinda Anzaldua, 26, a teller at a South Side bank, is accused of helping her boyfriend, John Olvera, 32, illegally withdraw money from a bank customer’s account.

Facebook provided San Antonio police investigators with their biggest clue, according to an arrest warrant affidavit.

Both Anzaldua and Olvera were arrested Monday on a forgery charge in connection with the crime which happened in June.

The affidavit stated that Olvera walked into the First Convenience Bank on S. Zarzamora on June 15 and went to the window where Anzaldua was working.

Police said surveillance pictures from the bank show the transaction, with Anzaldua waiting on Olvera and handing him $2,400.

The affidavit states that detectives discovered the account from which the money was withdrawn belonged to someone else.

Detectives conducted research using phone records and Facebook, and learned that Anzaldua and Olvera were involved in a romantic relationship, the affidavit stated.

It also stated that Anzaldua had been accessing several other customer bank accounts that same day.

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John Olveda