Valentin Alvarez-Marinez, a 31-year-old Hispanic man, vanished from Carbondale, Pennsylvania, on or around November 1, 2001. He was described as between 5 feet 8 inches and 5 feet 10 inches tall, about 220 to 225 pounds, with black hair and brown eyes. When last seen he reportedly wore a blue t-shirt, white socks, and black Nike sneakers.

No report was filed until January 20, 2005, when the Carbondale Police Department opened an investigation, creating a multi-year gap between his disappearance and the official missing-person report. Public details about his life, relationships, or state of mind at the time are scarce, and the case remains difficult to reconstruct. The case is listed in NamUs under MP50862.