IOWA CITY, Iowa (January 30, 2013)—Iowa investigators are seeking phone and e-mail records as they try to solve the mystery behind a winning $14.3 million Iowa lottery ticket that was withdrawn at the last minute after the winner refused to be identified.

A year after the investigation started, agents are still trying to identify the person who bought the Hot Lotto ticket in December 2010 at a gas station in Des Moines.

A New York lawyer claiming to represent the winning trust waited until minutes before the one-year deadline to claim the prize and then gave up rather than explain how he got the ticket.

Patrick Townsend of the Iowa Division of Criminal Investigation said agents issued subpoenas for phone and e-mail records in an effort to "link communication to some specific people who we think might be part of this."