Peter Decker was born March 8, 1946 in Opfenbach, West Germany. He immigrated to the United States with his mother Elfriede Decker in 1955. They were following his sister Ingeborg Williams who had already moved to the USA. His mother discovered that she was pregnant on the ship with his sister Patricia Decker. He served in the National Guard and fathered 3 children early in life: Peter Decker Jr., Brian Decker, and Denise Decker. He was a hard working entrepreneur his entire life even while attending law school. He eventually started a career as a District Attorney where he found his true calling and eventually retired as Deputy DA. He was a world traveler, a motorcyclist, a great cook, a voracious reader and a dog lover. He found the love of his life in Joanne Decker and took her on many adventures.