Police have intensified efforts to track down the killer of a seven-year-old girl known as "Nong Angoon" after senior officers travelled to Kanchanaburi to oversee the investigation into her death in a rubber plantation in Sangkhla Buri district.
Pol Gen Thana Choowong, deputy national police chief, visited the crime scene on Tuesday and instructed investigators and forensic officers to gather evidence.
The girl's body was found in a bamboo grove in a rubber plantation on Monday, two days after she disappeared from her village in tambon Prang Phle.
The case has drawn widespread attention after preliminary examinations found signs of physical assault. Authorities are awaiting autopsy results to determine the exact cause of death.
Investigators have collected DNA samples from villagers, monks at Ban Tikhrong Monastic Retreat and other persons of interest.
Police have also examined a pickup truck linked to the retreat and analysed forensic evidence recovered from the scene. A man previously questioned by police has denied involvement.
Officers have since brought in several other men for questioning and DNA testing.
