NYPD officials said officers arrested Lower East Side resident Christian Millet around 9 p.m. Wednesday in connection with the death of Edwin Echevarria, 65, whose torso was found last week after a ferry crew spotted the suitcase in the river near Governors Island. Both men lived in the same apartment at NYCHA’s Baruch Houses, according to police.

A Lower East Side man dismembered his older roommate, stuffed him in a suitcase and dumped it in the East River after the two fought about food, law enforcement sources said Thursday, as neighbors said the victim trusted the suspect and treated him like “his grandson.

The victim was identified as Edwin Echevarria, a 65-year-old man from the Lower East Side — and his alleged killer is his 23-year-old roommate, police said.