Jon Corzine, dead In Mexico City hotel room

The youngest son of former New Jersey Gov. Jon Corzine - described as a "lost" soul who battled addiction - was found dead in a Mexico City hotel through a search initiated by his family, a well-placed source told the News.

Jeffrey Corzine, 31, whose body was found in Mexico's largest metropolis "several days ago," had failed to respond to messages from his loved ones, the source said. The family launched a search that tracked him down by following his credit card usage, the source added.

It wasn't immediately clear how the aspiring photographer died, but a source familiar with the circumstances said Corzine took his own life Tuesday after suffering from severe depression for an extended period. His death, the source added, was not the result of a drug relapse.

Another source confirmed that Jeffrey had long struggled with drugs and alcohol.

"There was not a mean thing about him. He was very spoiled, but he was not a brat," the source said. "He was such a great kid. He'd been in rehab so many times, crashed cars, everything. He was super-sensitive and very lost. He was lost in a complicated family.