Tommy Schaefer, a 21-year-old American who was on vacation with his girlfriend and mother in Bali, has confessed to the murder of 62-year-old Sheila von Wiese-Mack, whose body was discovered stuffed in a bloody suitcase by a local taxi driver on August 13, police say.

According to investigators, witnesses heard Schaefer arguing with his girlfriend's mother in the lobby of their hotel, claiming that she wanted him to pay for his hotel room since she had paid for his flight. Police chief Col. Djoko Heru Utomo, speaking with the Associated Press, claims that Schaefer "was hurt and offended by the victim's words in an argument with him," and that was his motive for murder.

Via USA Today:

Police say they have considerable evidence tying the suspects to the murder, including security-camera footage from the hallway leading to Sheila Mack's room, bloody fingerprints on the suitcase, the heavy glass ornament believed to be the murder weapon, and DNA from blood on Schaefer's and Heather Mack's clothes.

The victim's daughter, Heather Mack, is three months pregnant. Mack confessed to helping Schaefer stuff her mother's body in a suitcase.

If the couple are convicted of planned murder, they could face the death penalty or life in prison. If the murder is determined to not have been planned, the pair face up to 15 years in prison.

[Image via AP]