Because he’d killed abroad, John Arthur Getreu's DNA wasn’t on a US criminal database, so investigators collected a disposable coffee cup that he’d discarded, which proved he was a match

When John Arthur Getreu was 18, he found himself behind bars. The American teen had a father in the Army, so he grew up living at various overseas military bases. During his adolescent years he lived with his family in Bad Kreuznach, Germany, and attended a high school with other children of service personnel.