Shot in The Dark

I am very confused about the “Shot in the Dark” case. About Monica Drum. It is located on this website.
Can someone write an analysis of the investigation detailing what lead you to your suspect(s)?
What is the Modus Operandi?
What is the Corpus Delicti?                                                                                                             Explain the suspect(s) Motive, Means and Opportunity?
What does the investigative timeline look like?