A physical examination has shown no indication of sexual assault against the 23-month-old girl who was rescued on Wednesday after she went missing from her home on Sunday.
Pol Lt Gen Prachuap Wongsuk, the commissioner of Provincial Police Region 5, said the results of the examination did not suggest the toddler was sexually violated.
He added that there was also no trace of food in her system for the 48 hours before she was found.
The girl was reported missing from her home in Ban Huay Fak Dap in tambon Inthanin of Mae Taeng district in Chiang Mai on Sunday night and found safe and sound on Wednesday morning in an abandoned hut in a banana plantation about 3km from her home.
A Myanmar national, identified only as Siew, 44, confessed to taking the child to a cave about 3km from the village as a sacrifice for the spirits of the forest and mountains.
Pol Lt Gen Prachuap said more witnesses are being questioned over the toddler's alleged kidnapping and Mr Siew has so far been charged with illegal entry only.
The investigation team, which consists of officers from Mae Taeng police, Chiang Mai provincial police bureau and Provincial Police Region 5, are also investigating a possible child trafficking ring.
A group of people, who were held for questioning over the toddler's disappearance, have been released, an investigation team revealed. The police have already collected their DNA samples for testing and the group, who spotted the toddler at the hut, have denied having anything to do with her disappearance.