
The civic society group Watchdog Thailand, which filed a complaint against the man, suspects he was a serial cat killer, as people in the neighbourhood have seen him killing several street cats earlier.
Police did not release the name of the man because he had not been formally charged.
Watchdog Thailand said another cat carcass was found on Sunday, which was believed to be the man’s latest victim.
The group filed a complaint with Phra Khanong police after the man was seen on security camera footage taken last Thursday luring a street cat and then killing it in a housing estate in Phra Khanong area.
He was seen pouring cat food from a bag on the roadside and when the cat approached the food, he grabbed it and killed it by smashing it against the ground. Its carcass was then dumped outside a deserted house.