The area bamboo wood street Dou son back tunnel in Yu

At around 9:00 A.M. yesterday, the area bamboo wood street Dou son back tunnel in Yu, one woman one side entrance to cave fell to a precipice above from the kitchen garden dam, after about 2 minutes, one man and then fell to a precipice above in the one side entrance to cave of Huang Sha Xi.
The witness said that the matter pushed an edge after delivering the ex- man beat woman the head break a blood and escaped on the way man to fall to a precipice to die.Be sent to hospital, rescue after the woman invalid die.Man is friends and relatives said that two one who fall to precipices are husband and wife, it has been more than 10 years since woman ran away, matter hair two talented persons reencountered two days ago.
Why does the man commit murder?Is man is falling to a precipice a suicide or false step?