A decorated WWII veteran was "killed execution style" while delivering milk in 1968. His murder has finally been solved.

Hiram "Ross" Grayam was a decorated World War II veteran who survived the Battle of the Bulge and witnessed the liberation of two concentration camps. After the war, he returned to Indian River County, Florida, and became a beloved milkman — only to be shot dead while on his delivery route in 1968.

Now, 56 years later, the so-called "Milkman Homicide" has finally been solved.

Thomas J. Williams, who died in 2016, has been identified as Grayam's killer, the Indian River Sheriff's Office said in a statement on Thursday. Williams "had confessed to Grayam's murder, his guilt echoing from beyond the grave," officials said while announcing that the cold case had been cracked.