Dennis P. (or "Denis") is the name police used to identify the 25-year-old man and former employee Dennis Phrommer of diamond trade company Gassan Diamonds in Amsterdam who committed a spectacular theft of 8137 diamonds, together 3,422.9 carats (684.6 g), and other jewelry, with a value of 10 million euro, from his employer on 4 August 2001. At the time it was the largest diamond theft in the history of the Netherlands. (In 2005 there was one on Amsterdam Schiphol Airport for an even larger value, 150 million euro, see also February 25, 2005.)
Gijsbert Termaat & Tjerk de Vries wrote a book about it, Aan de Haal.
Dennis P. is also the name of a Dutch 2007 film about this event, directed by Pieter Kuijpers, and based on the book.
Dennis P. bought a microwave oven and brought it into the office pretending that this was done to take it home later. After leaving the office he came back later in the evening pretending to take home the micowave oven after having forgotten it earlier. Instead, he emptied the box and filled it with diamonds, and simply walked out with it.
He fled to Germany and Mexico, but turned himself in on 4 September 2001.
Previously he was an army cook and served in Bosnia. He was employed at Gassan Diamonds only since April of the same year.
Dennis was sentenced to a prison term of 2.5 years, but was released earlier because of good conduct. Most of the stolen goods have been returned to the owner, but Dennis reportedly still owes him ca. 500.000 euro. The mother of Dennis' girlfriend Tiffany and the mother's lover got a suspended sentence for complicity.
Read more about Dennis P.: Film Plot