A man arrested with his wife for allegedly murdering their 2-year-old daughter has also admitted to killing four sons born to one of his three former wives, police said on Wednesday.
Songsak: Claims mental illness
Songsak Songsaeng, 46, and his wife Sunan Nahuanin, 40, from Kamphaeng Phet, were arrested in Pathum Thani. They were taken to Kamphaeng Phet to show investigators where they buried their 2-year-old daughter, after which they were returned to Bang Khen police station in Bangkok on Wednesday. The girl was found buried under concrete at her mother's house in Kamphaeng Phet.
During questioning at Bang Khen police station, a tearful Mr Songsak admitted to having killed his daughter, though he claimed mental illness drove him to commit the crime, according to police.
He said he felt guilty and wanted to apologise for what he had done.
Pol Maj Gen Atthaphol Anusit, commander of the Metropolitan Police Bureau's Division 2, said witnesses told police the family often quarrelled violently.
The couple's arrest came after social media influencer Kanthat Pongpaiboonvej, alias Kan Chompalang, called on police on Sept 10 to help two girls aged 4 and 12 whom local netizens said were often physically assaulted by their father.
When police arrived at their apartment in Bang Khen district, the girls' parents were not home.
The couple was known to have three children, but there was no sign of the youngest.
Neighbours said the couple had told them they sent the child to live with her grandfather in another province.
After their rescue, the two other girls told police their parents assaulted their youngest sister, causing her death.
Police later arrested the couple in Pathum Thani province. During questioning, Mr Songsak and Ms Sunan, a delivery rider, admitted to having killed their 2-year-old daughter.
Local media reported the couple were caught while withdrawing cash at the Big C store in Future Park Rangsit mall. Police seized a Honda Jazz from them, which was allegedly used to take their daughter's body to Ms Sunan's house in Kamphaeng Phet on May 21.
Bang Khen police chief Pol Col Anan Vorasart said on Wednesday investigators will continue to question the couple to find out why they killed their child.
A police source said Mr Songsak had 10 children by four women. He had one child each with his first and second wives, five with his third wife and three with his current wife.
The suspect admitted that he had killed four children born to one of his former wives.
The murders occurred in 2013, 2014, 2016 and 2018, according to the police source.