A man identified as the third suspect in the killing of six people in a family in the southern province of Binh Phuoc early July was arrested late Sunday, one month after the capture of the other two alleged murderers.

Tran Dinh Thoai, 27, was nabbed by Binh Phuoc police in an outlying area of Ho Chi Minh City following an arrest warrant by the provincial People's Procurary, officers confirmed to Tuoi Tre (Youth) newspaper on Monday.

Thoai, hailing from the southern province of Vinh Long but temporarily residing in Ho Chi Minh City, is now under investigation on charges of murder and robbery, according to police.

The man is considered a suspect in the murder on July 7, when wood magnet Le Van My, his wife, son, daughter and two other relatives were allegedly killed by Nguyen Hai Duong and Vu Van Tien, even though he was not at the scene when the bloodbath took place.

These two suspects, both 24, were arrested on July 11 and later admitted to committing the crime to steal the family’s assets and wreak vengeance on his ex Le Thi My Linh, who was My’s daughter, after she separated from him.

Binh Phuoc police said the arrest of Thoai is the result of the interrogation of Duong and Tien, who were subject to four months in custody on charges of murder and robbery on July 13.

Thoai is considered a suspect because he agreed to be Duong’s accomplice, according to a source close to Tuoi Tre with knowledge of the matter.

But the suspect eventually could not join Duong in carrying out the murder plot due to some unexpected, objective reasons.

He is thus facing charges of murder and robbery instead of “failing to report criminals,” the source said.

After failing to have Thoai as an accomplice, Duong purportedly asked Tien to replace him, and the two allegedly carried out the crime that sent shock waves across the country.

Binh Phuoc police said Thoai will be in custody for four months, pending their investigation.

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