Two former German police officers have gone on trial for a daring smash and grab robbery of a jewelery store earlier this year. Thieves made off with €200,000 ($237,339) worth of precious stones. The pair are accused of driving a stolen black BMW through the window of the shop in Bamberg, northern Bavaria, some 230 kilometers (142 miles) north of Munich, on January 15. Both suspects are 31 years old. They can only be named as David S., who served in Hamburg, and Felix B., an ex-Berlin police officer, for legal reasons. The raid happened in the early hours of the morning, leaving the suspects to …