Directions Research and write about the unidentified serial killer called the Zo

Directions
Research and write about the unidentified serial killer called the Zodiac Killer. This cold case is currently unsolved. 
Essay requires proper APA citation format (in-text citations where appropriate in the slides and a Reference slide).
Use your research and answer the below questions. Discuss the following:
1. Facts of the killings.
2. What about the killings makes law enforcement believe it is a serial killing.
3. Analyze the victims and discuss any common characteristics.
4. Give an opinion on the profile of the killer. (i.e. compose a portrait that speculates on the killer’s age, race, sex, marital status, employment status, sexual maturity, possible criminal record, relationship to the victim, and likelihood of committing future crimes.)