Autistic child Zayn Rayyan Abdul Matiin, who was found dead in a stream in Damansara Damai, Petaling Jaya on Wednesday, is believed to have been murdered elsewhere before his body was dumped there.

Bukit Aman Criminal Investigation Department director Mohd Shuhaily Mohd Zain said the post-mortem results showed that the six-year-old boy had died 48 hours before his body was found.

"Based on the autopsy findings...