The suspected team member idea is tiring.
Another story line where one of the team is a suspect. It seems almost obligatory that some clever fiendish person is set on a clever revenge trip. Have all of this lot had their go at this. Clarissa needs to be a the suspect in the next usage of this tired recipe. The tyre marks being the giveaway of course.
Come on every single series with crime as part of it's make up has to do this.