The Institute of Forensic Science used a new method for collecting DNA from the crime scene, as well as a new reagent on the victim’s clothes, which revealed a large amount of the suspect’s DNA. This was then compared with DNA collected from the suspect’s older sister and son, with the test finding 10 matches with the sister and seven with the son. The institute will now focus on the examination of mitochondrial DNA and male chromosome genetic material from the suspect’s father, a process likely to take approximately one month.
“The DNA from the suspect’s relatives matched that of the DNA collected from physical evidence in the case but we were unable to test that of the suspect himself as he was cremated,” Somsak said. “Even if we are unable to close the case at this stage, our investigation will go to the very end. We have no problem with the authorities from Japan joining us for the DNA testing if they so wish and we confirm that the Thai government has not abandoned this case.”
Justice Minister said that 41 scientific tests have been undertaken, 29 of them based on physical evidence, and 330 people have been investigated.
“The DNA collected from the victim’s clothes is not complete because humans have 23 pairs of chromosomes, but we can collect only three pairs of complete DNA,” he said. “In addition, we found other people’s DNA which may be from friends or people who are not involved with the case.”
Tomoko’s murder not forgotten, says Somsak
Japanese man sought in rape and murder of tourist 10 years ago
Published : November 21, 2019
By : The Nation