CSD commander Pol Maj-General Sapphuang Suthin said they were hoping to find additional evidence, such as bloodstained clothes, in Dechathorn Mulsri’s apartment, on Soi Charansanidwong 65 in Bang Plat district.

Forensic officers collected samples from the room, which was said to be in a tidy condition, to look for evidence.

The apartment caretaker told police that Dechathorn had rented the room along with friends in 2015. Other tenants said it was frequented by visitors who often made noise.

The search related to the murder of student Thirapong Thitatharn, 24, who was fatally stabbed in his dormitory in Phetchaburi on February 25 after about 20 assailants burst into his room. He succumbed to the injuries on March 2.

Suthin said additional evidence from the scene of the attack had been submitted for DNA testing.

Investigators were checking if there were grounds for a claim by the victim’s family that three more individuals had been involved in the attack, he said.

Suthin said it was unlikely that any influential figure or group would try to pressure or intimidate the witnesses, in response to earlier speculation that the real perpetrators of the crime might be shielded from law enforcement.