The board at Switzerland's biggest lender thinks a trial cold pose dangers for Khan and the bank, especially if new details emerged that could incriminate Khan, the paper said. It could also be embarrassing for Khan if prosecutors dropped the proceedings without a result, it added. Khan, who left Switzerland's second-biggest bank in July and began working at UBS in October, was under surveillance by private detectives hired by Credit Suisse from Sept. 4 to Sept. 17, when he spotted them.

The affair saw suicide and espionage invade the secretive world of Swiss private banking, and exposed a feud between Khan and Credit Suisse CEO Tidjane Thiam. Credit Suisse has cleared Thiam of involvement in the affair, which was blamed on Chief Operating Officer Pierre-Olivier Bouee, Thiam's right-hand man. Bouee resigned following the investigation.

Copyright Reuters, 2019