In a bizarre twist to a Cambodian casino murder case, one of the four accused has been released after police realized she was a hostage of the other three suspects.

On Sunday, police in the Cambodian town of Bavet arrested four Vietnamese employees of the New World Casino & Hotel in connection with the death of Vietnamese citizen Ngueng Yang Yoeng, who’d crossed the border to gamble but wound up dead.

Police said the four accused – three women and one man – had lent Yoeng money when he went bust at the New World’s gaming tables, then held him against his will when he couldn’t pay his debt. They made Yoeng contact relatives back in Vietnam, then apparently beat him to death when his family couldn’t come up with enough dough.

However, police now say that one of the arrested women was actually another gambler who’d been held against her will at the hotel by the other three accused for 20 days. Cambodia Daily quoted serious crime bureau chief Kim Lay saying the woman had been lured by the other three to gamble at the casino, only to fall into the same ‘go broke and borrow money’ trap, which also led to the gang extorting money from her wealthy family in Vietnam.