Evidence:
Hypothesis: I believe that the plants died at the hands of stink bugs (as seen in the picture above). My team and I found one running away, suspiciously close to the crime scene. I immediately went to observe our plants and we found bug bites (also seen in the pictures above) in them ones that would fit the description of a stink bug's bite. Given all the evidence I think it's pretty clear that stink bugs(independent variable) left our plant bitten and rotting(dependent variable)
Experiment:The experiment is simple. We have the pictures of our plant with all the bug bites on them and we have the bug that supposedly did it all we have to do is put a piece of the Broccoli Romanesco in there, and wait for the bug to eat it. If the bug bites match my hypothesis is correct and the stink bug did do it, if they don't match than something else might have killed it.