An excavator continued to dig up earth in search of remains of women who were allegedly murdered by Andres N., also known as El Chino—or The Chinese—, inside his home in the Mexican municipality of Atizapan de Zaragoza, El Pais reported.

The 72-year-old suspect was jailed following a police search that found evidence that he had killed and dismembered one of his victims, 34-year-old Reyna Gonzalez, who went missing.

Agents from the Attorney General’s Office for the State of Mexico found jewelry, nail polish, shoes, a hair dryer and several items that have been linked to two other women who disappeared in 2016 and 2019.

The findings convinced investigators that they were dealing with a serial killer. Andres N. has admitted to as many as 30 murders over the course of two decades, according to the news agency Efe.

Andres N. made a living by renting out rooms in his house.

His last victim, Reyna Gonzalez, ran a small cellphone store near his house, and has been described as a single mother of two or three children. “The man was always there at her store, always talking to her, always there,” said Karla Narvaez, standing behind the counter of her pharmacy, located two city blocks from the scene of the crimes.