According to cops, 53-year-old Aleksey Germash was a United States Postal Service (USPS) veteran for 16 years.
Federal officials say they arrested the 16-year employee after receiving a tip about a auto owned by Germash that contained 20 full mail bags.
Among the mail trove found in Germash's Nissan Pathfinder, his apartment and his work locker was a letter from 2005, according to Brooklyn federal prosecutors.
When questioned about it Germash said he would take the mail from work to his Brooklyn apartment adding that, "he was overwhelmed by the amount of mail that he had to deliver and made sure to deliver the important mail", court documents state.
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A NY mailman has been arrested for stockpiling thousands of pieces of undelivered mail, spanning nearly 15 years. He said he started stashing letters at his Brooklyn apartment several years ago, but that he always "made sure to deliver the important mail", according to the document filed in the U.S. District Court for the Eastern District of NY.
Authorities say they found 10,000 pieces of mail in his vehicle, 6,000 pieces in his apartment and 1,000 in his work locker. Approximately 1,000 pieces lay in the man's locker at the Dyker Heights post office, while another 6,000 or so pieces remained in his apartment.
When investigators got to Germash's auto, they found more than 20 post office bags, containing 10,000 letters.
Police charged Mr Germash with knowingly holding onto mail, an offence that's punishable by up to five years in prison. He declined to comment as he left the federal courthouse.