Oregon man confesses to 1979 Boston murder after DNA match, decades after another man's acquittal

A man confessed to killing a woman with a hammer in Boston in 1979, providing details that matched the crime scene.
The man's DNA matched samples from the decades-old crime scene.
Another man had previously been tried and acquitted for the same murder in 1981.
The confession came voluntarily when the man walked into an FBI office in Oregon.
The man also confessed to another murder in a different state.