1. Offender is at least 18.

2. Offender is white.

3. Offender is male.

4. Victim is a white female.

5. Victim is either white or female.

6. Victim and offender are from the same age category.

7. Victim and offender are from different age categories.

8. Victim and offender are of the same race.

9. Victim and offender are of different races.

10. Victim and offender are of the same sex.

11. Victim and offender are of different sexes.

12. Without knowing the contents of the forensic team's report, what is your best prediction of the age, race, and sex of the victim? Explain your reasoning.

13. What is your best prediction as to the age, race, and sex of the offender? Explain your reasoning.

Soon after you finished this analysis, the preliminary forensics report was delivered. Although no identification had been made, the autopsy suggested that the cause of death was blunt-force trauma and the body had been in the water at least 2 weeks. The victim was a white female with blonde hair, estimated as being in her mid-thirties, showed no signs of having had children, and was wearing no jewelry.

Based on this new information, you develop a new offender profile by determining the likelihood that the:
14. Offender is at least 18.
15. Offender is white.
16. Offender is male.
17. Victim and offender are from the same age category.
18. Victim and offender are from different age categories.
19. Victim and offender are of the same race.
20. Victim and offender are of different races.
21. Victim and offender are of the same sex.
22. Victim and offender are of different sexes.
23. What is your best prediction of the age, race, and sex of the offender? Explain your reasoning.
24. Did your answers to the offender questions change once you knew the age, race, and sex of the victim? Explain.
Suppose that 45% of murder victims were known to be related to or acquainted with the offender, that 15% were murdered by an unrelated stranger, and that for 40% of victims relationship to their killer is unknown. Based on all the information available, complete your offender profile for this case.
While fishing on a river one spring morning, Robert Donkin slipped through the underbrush that lined the river's banks. Nearing the shore, he saw a large canvas bag floating in the water, held by foliage that leaned over the river. Upon closer inspection, Mr. Donkin observed what he believed to be hair floating through the bag's opening. Marking the spot of his discovery, the fisherman fetched the authorities.
Preliminary investigation at the scene revealed a body in the bag. Unfortunately, it was impossible to identify the corpse's sex, age, or race immediately. Forensics was assigned to identify the victim and estimate the cause and time of death. While waiting for the forensics analysis, you, the detective in charge, have gathered the information shown in the tables concerning victim-offender relationships from recent reports from the FBI.

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Age of Offender Age of Victim At Least 18 Unknown Less Than 18 Less than 18 At least 18 39 124 619 290 480 5628 4 80 80 21 Unknown Sex of Offender Female Sex of Victim Unknown Male 4710 Male Male 490 89 Female 1735 150 24 11 26 Unknown 50