From the evidence presented, what can you conclude about the identity of the gunman or gunmen who shot Count Sturgkh? Choose only one of the options presented below and explain the reason(s) for your choice.

A: Mr. X is the gunman

B: Mr. Y is the gunman

C: Both Mr. X and Mr. Y are the gunmen

D: There is no proof that either Mr. X or Mr. Y is the gunman

Ruritania Case Study - The Sturgkh Assassination Date: November 25th, 2013 Citizens of Ruritania are shocked to hear the news of the assassination of their beloved Prime Minister, Count Sturgkh. He was shot as he had breakfast at the Sidewalk Caf, near the junction of Adler and Oswald Streets. A map of the area is given below. The terrible event is initially investigated by the Municipal Police, but, due to the seriousness of the crime, a second investigation is carried out by the Security Police. Curiously, the two investigations reach different conclusions and identify different suspects. The waiter gives the following statement to the Police: \"It was just after 9 a.m. | know that because | had just heard the time signal on the radio. | was standing in the caf doorway. He turned towards me to order another caf latte and, as he was speaking, there was a terrible noise and he fell backwards to the ground.\" At the autopsy, it is noted that there is a bullet entry wound on the right side of Count Sturgkh's head, 8 cm above the ear, and an exit wound just below the left ear. Three bullet fragments (numbered 1, 2 and 3} are extracted from the Count's head. Two deformed bullet fragment (numbers 4 and 5) are also found embedded in the table. Trace element analysis of the bullet fragments gives the results shown in the table below: Fragment Silwer (Ag) / ppm Antimany (5b) / ppm 3 69 712 4 85 811 T 5 9.1 733 The Municipal Police conclude that there was only one gunman. They suspect Mr. X. He was arrested by a traffic policeman after exiting a back door of the Ruritanian State Book Depository shortly after the incident. The policeman observed him dropping an object into a garbage bin. He was observed to be in an agitated state and his jacket was torn, but he claims that he had just been looking for some books on the ground floor when he heard a noise that scared him. A search of the book depository focused on a store room on the third floor. Three cartridge cases are found in this room. Fibres, bright yellow in colour, are found attached to a loose nail by the door. Using IR spectroscopy, the Municipal Police forensic sdentists find that the fibres are identical to the fibres of Mr. X's jacket. A firearm is found in the garbage bin. Back at their Forensic Laboratory, the Municipal Police test fire a bullet from this gun. They claim that the striztions on the cartridge cases, caused by the rifling, found at the book depository match the striztions on the cartridge case from their test firing. The following day, Mr. X is handed over to the Security Police. At their Forensic Laboratory, his hands are tested for G5R. The test is negative and Mr. X is released. The Security Police choose to investigate the Oswald Street Apartments Building, as a rear window is observed to have been smashed. It is known that this building has been unoccupied for some time. Upon entry, broken glass is found on the floor inside. An almost empty battle of a soft drink is found inside the back door. A partial fingerprint is found on the bottle. They search the apartments and their search focuses on Apartment 03-01 from where there is a good view of the caf. CCTV footage recorded at the back of the Oswald Street Apartments shows a man |eaving the building. From this footage, the Security Police identify Mr. Y as the suspect. They claim that the partial print from the bottle matches one of the fingerprints of Mr. Y. (a0 LR Figure 1. Map of the area where the crime occurred Figure 2_ A CCTV image of Mr. 3900 3340 OOEE 3000 The partial fingerprint 2817 2050 2900 IR spectrum of fibres from Mr.X's jacket Wavemembers jon ) 3000 1653 1500 1456 Mr. Y Fingerprint 1429 1382 1335 1315 1205 1181 1109 1000 1057 1033 1002 898 706 1867 500 558 522 347102 100 1205 1653 706 1456 347 1362 558 1315 1161 1420 1814 1335 2850 2017 Transm Hangs 1109 1002 1057 1033 3300 3340 3500 2000 2500 3060 1500 1050 500 IR spectrum of fibres from the nail in the Book Depository window 1 window 2 chair ashtray writing desk suilcase bookshelf umbrella . Window 1 is locked. . Window 2 Is partially open. Figure 3. The front room of apartment 03-01 in the Oswald Street Apartments (windows face Oswald Street)window 1 window 2 chair bookshelf bookshelf crate of books . Both windows are unlocked. Figure 4. The third floor storeroom in the Book Depository (windows face Adler Street) 100 621 1046 1072 3851 3077 1311 1240 2050% 2920 1-402 1454 Trianon Hanoi 3283 1530 1845 3500 2500 2000 1500 1080 500 Wawenumbers fom-!) IR spectrum of wool\fTransmitinc " Transmitting TO 302 12 ERES 3600 3500 3340 3080 2837 2817 2850 2850 2580 2560 IR spectrum nylon IR spectrum of cotton Wavenumbers (on- 1) 2030 2030 1736 1663 1 500 1530 1500 1464 1456 1417 1429 1971 1962 1335 1274 1315 1205 1143 1181 1800 1080 1057 1033 1002 800 TOS TE 614 500 580 558 522 350 347100 95 319 945 438 1733 593 1127 3084 90 721 368 1067 1377 1244 85 80 1464 75 3287 1554 % Transmittance 70 65 60 2852 55 1641 50 45 2923 40 3500 3000 2500 2000 1500 1000 500 Wavenumbers (cm-1) IR spectrum of polyamide Note: It is not necessary to read the peak values printed on the spectra