Authorities said they were now “convinced” their first arrest, a man named as Adem Karadag, planted the bomb on August 17 which killed 20 people after weeks of an often confusing and contradictory police investigation.
Earlier police said it was unlikely that either of the two foreign men held in custody over the unprecedented and unclaimed attack on the Thai capital were the key suspect as they issued arrest warrants and hunted for several others.
But on Saturday national police spokesman Prawut Thavornsiri said further probing had revealed Karadag, whose nationality remains unconfirmed, was the bomber.
“It is confirmed that Adem is the man in the yellow shirt based on CCTV footage, eyewitness accounts and his own confession,” Prawut said.
“After he placed the bomb at the shrine he called a motorbike taxi and changed his shirt at a restroom in (nearby) Lumpini Park” before travelling to the flat on the outskirts of Bangkok where he was arrested last month.
On Saturday afternoon Karadag was taken on a reenactment of his alleged role in the crime — a standard Thai police procedure — surrounded by dozens of reporters and passers-by.
Handcuffed and wearing a yellow t-shirt beneath a black bulletproof vest he was escorted around the Erawan shrine, nestled between luxury malls and hotels in a bustling downtown district, before being driven to Lumpini Park.
Karadag now faces up to eight charges including premeditated murder, said Prawut, a crime that carries a maximum penalty of death.