Two other infant sons from a previous marriage are also suspected to have been killed by Songsak Songsaeng.

A two-year-old girl’s body was found buried beneath a kitchen floor last week, leading to the charges.

According to police, Mr Songsak claimed he had a history of mental illness and killed his children because he couldn’t stand the sound of their cries.

His wife has also been charged with murder over the death of their two-year-old daughter. His ex-wife has also been charged with the deaths of the two boys. They have all been arrested. There have been four marriages for Mr Songsak.

Earlier this month, Bangkok police were alerted to a possible domestic violence case in the Bang Khen district.

It was reported by Mr Songsak’s neighbors that his two daughters, aged 12 and four, were being physically abused. While their parents were away, the two daughters were rescued by the police.

According to the 12-year-old, their parents beat their two-year-old sister, resulting in her death. She also assisted police in finding the body in north-west Thailand, where it was buried under a kitchen floor. The Thai police have also charged Mr Songsak with the murders of two other sons he had with his third wife, whose bodies were found 10 years ago and whose DNA matched Mr Songsak’s.

According to his third wife, he killed their four infant sons and buried two of them.

There is a possibility that the two others may have been buried under the area where a petrol station once stood.