40 a) On December 20, 2001, following a request to the Land Register Department of the municipality of Mixco, the investigators of the Bureau of Criminal Investigation of the PNC Homicide Section in charge of the case obtained the name of the owner of the building indicated by the anonymous informant as the place where the vehicle from which the corpse had been taken had entered. 149 On January 8, 2002, the investigator tried to interview the owner of the building, but was unable to find him. Subsequently, on January 18, 2002, a site inspection was conducted and the investigator went to the house again and observed that there was no vehicle with the characteristics described by the anonymous informant. 150 On July 8, 2003, Assistant Prosecutor I searched the building and reported that the vehicle described by the anonymous informant had not been found, or any other evidence related to the murder,151 and b) In June and August 2005, the vehicles owned by two suspects with whom María Isabel had been in communication the day she disappeared were examined.152 110. Analysis of clothes and other items of evidence. On December 29, 2001, the criminal investigations expert reported that the evidence collected on December 19, 2001, in Funerales Mancilla S.A. had subsequently been sent to the laboratory of the Scientific and Technical Department of the Public Prosecution Service for different analyses to be carried out.153 The results of the analyses were as follows: a) On January 4, 2002, the expert witness from the Biology Section of the Public Prosecution Service issued a report on the analyses performed on the clothes, 154 and concluded that the denim trousers, black shirt, two towels, underpants, brassiere, socks and nylon bag had traces of blood, but not of toxic substances or semen. 155 The same day, a test was also carried out to determine the blood group of a cloth sample with blood;156 b) On January 7, 2002, the expert witness issued a report on the analysis of the clothes157 and indicated that the elements of hair found on the denim trousers, and on the blue towel were of animal origin, and on the other clothes they were of human origin;158 c) On February 19, 2002, the Toxicology Section of the Bureau of Criminal Investigations transmitted expert appraisal TOXI 01-2886 carried out on the trousers and socks and on one towel that was found by the body. The results were negative 149 supra. Cf. Report of the Homicide Section of the Bureau of Criminal Investigation of the National Civil Police, 150 Cf. Report of the Homicide Section of the Bureau of Criminal Investigation of the National Civil Police, supra, and Request for authorization for a search of June 26, 2006 (file of annexes to the motions and arguments brief, tome I, annex 20, f. 5,383). 151 Cf. Report of Assistant Prosecutor I of Mixco Agency No. 5 of July 8, 2003 (file of attachments to the Merits Report, annex 17, f. 112), and Decision of the Mixco Court of First Instance of October 8, 2009 (file of annexes to the motions and arguments brief, tome I, annex 27, f. 5,411). 152 Cf. Report of telephone calls provided by Telgua, supra; Request for an investigation by the Bureau of Criminal Investigations, supra, and Note of the District Prosecutor of the municipality of Mixco of August 5, 2005 (file of annexes to the motions and arguments brief, tome I, annex 24, f. 5,405). 153 Cf. Report of the criminal investigation expert, supra. 154 According to the expert appraisal presented, the analyses performed on María Isabel’s clothes consisted in phenolphthalein tests, a test to determine the origin of the species, a test to determine the blood group of the dry blood, luminescence tests with ultraviolet lamp and acid phosphatase test, and test to detect seminal protein P-30. 155 Cf. Expert opinion No. BIOL-01-1512 of the Biology Section of the Bureau of Criminal Investigations of January 4, 2002 (file of annexes to the motions and arguments brief, tome I, annex 11, fs. 5,330 to 5,332). 156 Cf. Expert opinion No. BIOL-01-1510 of the Biology Section of the Bureau of Criminal Investigations of January 4, 2002 (file of attachments to the Merits Report, annex 15, f. 103). 157 According to the expert appraisal presented, the hairs were measured and then fixed with chemical elements on glass slides to observe their microscopic characteristics. 158 supra. Cf. Expert appraisal No. BIOL-01-15-12 of the Biology Section of the Bureau of Criminal Investigations,