It was Kaem's first time on a train.
She was returning from the city of Surat Thai with her two sisters and one of their boyfriends to the Thai capital Bangkok, a popular route for tourists going to and from the country's popular southern beaches.
They were sharing a sleeping carriage, and turned in for the night. By the morning Kaem was gone.
Police searched the train and the track as the teenager's frantic family turned to the media for help in finding her.
Three days later, her body was found naked near the track; she'd been raped, suffocated and tossed out of a window by her attacker who told police he had been drinking and was high on methamphetamine, according to Police Major General Thanet Soonthornsuk.