SOUTH BEND – Investigators are searching for a second person in connection with a robbery Monday at a South Bend bank.

South Bend police Capt. Phil Trent said Wednesday detectives would like to speak with a man who allegedly drove the woman who committed the robbery away from the scene.

“At this point, we don’t know his exact role — if he just drove or if he was involved further,” Trent said. “We haven’t been able to locate him or the vehicle since the robbery.”

In the meantime, prosecutors have charged Zandra Knepp, 19, of South Bend, with one count of robbery, a class C felony.

According to court documents, it was Knepp who walked into 1st Source Bank, 2323 S. Michigan St., shortly before 2 p.m. Monday. After making small talk with one of the tellers, Knepp allegedly handed the teller a note demanding money, which also said Knepp “had people outside” and if the teller complied no one would get hurt.

The teller turned over an undisclosed sum of cash, but included a dye pack and a GPS tracking device along with the cash.

Police arrested Knepp about 36 minutes later after following a signal from the GPS device to a house in the 2500 block of South Michigan Street — less than two blocks from the bank.

According to court documents, when police arrived at the house a woman who lives at the house said another woman had entered the house and was downstairs. Knepp was found sitting on the basement steps. Nearby, officers found a trash bag that contained camouflage clothing similar to what the robber had been described as wearing. An exploded dye pack, cash and the GPS tracker were also recovered, according to the court records.

A bank employee positively identified Knepp as the robber, according to the court records.

During an interrogation, Knepp allegedly told police she robbed the bank and did so at the suggestion of a drug dealer she had been hanging around, according to court records.

Knepp also allegedly told police the drug dealer is the person who drove her to the bank and gave her the demand note.

A judge has set bond for Knepp at $30,000 corporate surety or $3,000 cash.