The woman was bedridden for two years and appeared to become unresponsive and stop breathing days before the incident, according to Soodthoop’s account of the brother’s story.
Soodthoop said the brother was refused cremation for his sister as he did not have an official death certificate.
He earlier brought her to a Bangkok hospital, to which she wished to donate her organs, and was rejected for the same reason, he told AP.
He drove over 500km from another province to the hospital with his sister in the coffin.
The temple manager told AP he was telling the brother how to get a death certificate when they heard the knocks on the coffin.
She was then assessed and sent to a nearby hospital.