Drawing Conclusions from the evidence can be complicated, but we like to keep it as simple as we can. Take things one step at a time and do a meticulous job when reporting who you think the murderer in this case is.
Remember, we don't want to send an innocent person to prison!
We will have a class discussion about the evidence you have seen in this case. Afterward, you have been asked to send a report to the district attorney. Your report should be organized, professional, robust, and (again) meticulous.
This is going to turn into a detailed, five-paragraph, informative/ explanatory writing, so pay extremely close attention to the teacher. Listen to all of the steps to writing an organized paper...and remember, the district attorney does not respect sloppy reports!