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About midnight on Saturday, the strangled body of a regular patron of the Seedy

ID: 51776 • Letter: A

Question

About midnight on Saturday, the strangled body of a regular patron of the Seedy Lounge was found in an alleyway near the bar. The police interview of workers and patrons A-R remaining in the bar. A few of the patrons indicate that several individuals, including the bartender, owed money to the victim. The police notice that the bartender and patrons A, C, D, F, K, L, O and R all have recent cuts and scratches on their faces and backs of their necks, but are told that these happened during mud-wrestling matches earlier in the evening. DNA samples are obtained from the bartender and the bar's patrons, from tissues of the victim, and from scrapings of her fingernails. STR analyses are performed on the DNA samples using three of the markers described in Question 10.43: THO1, D18S51, and D21S11. The sizes of the PCR products obtained in each DNA sample for each marker are shown in the table.

Considering the results of only STR marker THO1, which individual(s) should the police investigate further?

Select all that apply.

patron A

patron B

patron C

patron D

patron E

patron F

patron G

patron H

patron I

patron J

patron K

patron L

patron M

patron N

patron O

patron P

patron Q

patron R

bartender

patron A

patron B

patron C

patron D

patron E

patron F

patron G

patron H

patron I

patron J

patron K

patron L

patron M

patron N

patron O

patron P

patron Q

patron R

bartender

Explanation / Answer

The police should investigate the suspects C, D, E, g, J, K, and R. All these suspects match more with the STR or DNA on victims nail scrapings, with more than three loci in common.