Following a drinking session, Tran Minh Hieu, 38, went to the 29-year-old woman's boarding house to talk, then retrieved a knife from his home, returned, and stabbed her and another man.
Ma Kien La, 36, stated he attacked his partner with scissors, causing her death and injuring her son, after she rejected his apologies and pleas to reconcile.
Nguyen Ngoc Dao has been sentenced to death for fatally shooting a Grab driver, concealing the body, stealing the car, and then attacking his wife's parents at their home, which resulted in one death.
Nguyen Hong Linh, a physical education teacher at Le Dinh Chinh Primary School, has been arrested on suspicion of murdering a female librarian due to jealousy and disposing of her body in a coffee farm.
