hile fishing on a river one spring morning, Robert Donkin slipped through the un
ID: 3311926 • Letter: H
Question
hile fishing on a river one spring morning, Robert Donkin slipped through the underbrush that lined the riv- er'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 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 the authorities. sex of the offender? Explain your reasoning Preliminary investigationat the scene revealed a body in the bag. Unfortunately, it was impossible to iden 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 and time of death. While waiting for the forensics analysis, death was blunt-force trauma and the body had been in you, the detective in charge, have gathered the informa he 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 tify the corpse's sex, age, or race immediately. Forensics was assigned to identify the victim and estimate the cause tion shown in the tables concerning victim-offender rela tionships from recent reports from the FBI Using the information contained in the tables, you develop a preliminary profile of the victim and offender no jewelry by determining the likelihood that the: Age of Offender Age of Victim Less than 18 At least 18 Unknown Less Than 18 Unknown 39 480 21 At Least 18 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 619 5628 80 290 Sex of Offender Sex of Victim Male Female Unknown Male 4710 1735 50 Female 490 150 Unknown 89 26Explanation / Answer
1.Probability that the offender is atleast 18
= (619+5628+80)/(124+290+4+619+5628+80+39+480+21)
= 6327/7285 = 0.8685
2.Probability that the offender is white
= (3026+208+54+30)/(3026+208+54+30+573+3034+28+27+53+12+97+4+57+49+7+26)
= 3318/7285 =0.4555
3. Probability that the offender is male
= (4710+1735+50)/7285
= 6495/7285 = 0.8916
4. Probability that the victim is white female
= 1883/(5067+6294+301+131+1883+1126+105+42+6+1+0+34)
= 1883/14990 = 0.1256
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