JUST three hours before they fell to their deaths from a ninth-floor window two Saturdays ago, Sia Chan Hong and Ku Witaya were said to have been celebrating a friend's birthday at a barbecue at East Coast Park.

When the party ended at three in the morning, a bunch of them made their way to Witaya's home at Block 667 in Jalan Damai, off Bedok Reservoir Road.

Later that morning, their friends left to buy food. When they returned at 5.20am, they found the two 16-year-old boys sprawled at the foot of the block, motionless.

Read the full story in tomorrow's edition of The Sunday Times.