At first, Josiah Rogers said he thought his older brother, a Las Vegas police officer, was joking when he brought up the idea of robbing a casino. But then the conversation took a turn, and soon they were putting a plan together for a heist in November 2021, he said. Rogers revealed details of the extensive planning that went into the robbery when he took the stand Thursday and testified for several hours against his brother, Caleb Rogers, who was on trial this week over a trio of casino heists in late 2021 and early 2022. The jury began deliberating...