After deciding which part of Leo's many accomplishments you'd like to research with your expert group, tell your fellow teammates goodbye for now. It's time to work with some fellow detectives. After getting with them, click on the appropriate link at the bottom of the screen. Here you'll find the tasks that your expert group must accomplish before you're allowed to return to your home group.
You will have 2-3 days to complete this task. That decision will be made by the manager of the detective agency. Be sure she sees you diligently researching and working cooperatively with your fellow expert group members as those are skills needed to earn permanent employment.