Kiattisak ‘Gus’ Thawornphon, 18, presented himself at Cherng Talay Police Station yesterday (Mar 17).
He was placed under arrest and immediately taken into the police station for questioning.
Kiattisak was already wanted on an arrest warrant issued by the Phuket Provincial Court for the murder of Teerapat Suksrimuang, 21, a resident in Pa Khlok.
Mr Teerapat was shot at the Caltex petrol station on the Baan Don-Cherng Talay Road, in Baan Pasak, shortly after 10pm on Friday. He was rushed to hospital but later pronounced dead from his injury.
According to police, Kiattisak confessed to the shooting.
He also gave the location of the gun and Honda Scoopy motorbike used to carry out the attack. Police officers soon recovered both the gun and the motorbike, which had been dumped in the Layan area.
Kiattisak remains in detention at Cherng Talay Police Station.
So far police have not revealed any motive for the shooting.