First, select a recent crime story and briefly (1-3 sentences) explain what happened.
Next, develop a hypothesis for why what happened took place. See your textbook. I expect to see Null, Positive and Negative hypotheses. This is not your opinion but rather an educated prediction. Use the KISS rule.
Next, come up with a way to test your hypothesis and identify the independent variable (what you think the cause is), the dependent variable (what you will measure) and how you will operationalize your dependent variable (how you will measure it).

*Use this story  http://www.prisonexp.org/

Use to help with  assignment 
https://www.verywell.com/steps-of-the-scientific-method-2795782