Royal Thai Police chief Pol Gen Chaktip Chaijinda told the media on Thursday that police found a video footage from a surveillance camera at a construction materials shop showing Artur Segarra Princep in the shop buying something.
He, however, refused to elaborate what did the suspect buy from the shop.
He said that results of DNA tests of evidences found at a house in Soi Ramkhamhaeng Soi 174, a condominium at Ramk IX area and at another condominium in Sukhumvit were expected within next week.
The police commissioner shrugged off a Spanish press report which said Artur had implicated the other people for being responsible for the death of the victim, David Bernat, whose body was dismembered and dumped into the Chao Phraya river.
Meanwhile, Pol Maj-Gen Thawatchai Mekprasertsuk, commander of police forensic science, said police were trying to find out whether the DNA samples found at the three sites matched.