The suspect in the Kovan murders is a 34-year-old police officer of senior staff sergeant rank from Bedok police division, an ongoing police press conference has revealed.
The suspect, Iskandar Rahmat, is in custody in Malaysia. He was arrested at 11.30pm on Friday after close coordination with Malaysian police.
The press conference is being chaired by Deputy Prime Minister and Home Minister Teo Chee Hean and Police Commissioner Ng Joo Hee.
Car workshop owner Tan Boon Sin, 67, was killed in his 14J Hillside Drive terrace house in Upper Serangoon on Wednesday afternoon.
His older son, Mr Tan Chee Heong, 42, was seen staggering out of the house before collapsing in a pool of blood at about 3.40pm.
A few minutes later, someone drove the elder Mr Tan's Toyota Camry out of the house, in the process running over the younger Mr Tan.
The body was dragged by the car for more than 1km before it was dislodged outside Kovan MRT station. The driver sped off.