An Indonesian man was arrested on Monday after allegedly murdering a family of three. On October 8, Agus Hariadi of North Sumatra allegedly threw his three neighbors into a river nearby, the Daily Mail reported.

Hariadi and three other men were arrested on October 22.

According to police the victims, Muhajir, 49, his wife Suniati, 50, and their son Solihin, 12, repeatedly teased Hariadi because of his weight, often calling him a “fat elephant.” The taunts from the family allegedly pushed him into committing the crime.

Information obtained from interrogating the suspects revealed that the four men entered the victims’ house under the pretense of borrowing money. Agus is believed to have struck Muhajir’s head with a stone after they worked in.

The three victims were tied up and thrown into a river soon after. Authorities said the youngest victim was already dead, but his parents were still alive when they were thrown in. Mobile phones and the vehicle used to carry the bodies were also seized as evidence.

The group of four could be given the death penalty if found guilty of murder.