UNDATED (WSAU-Wheeler News) Milwaukee serial killer Walter Ellis died yesterday.
He was serving seven consecutive life prison terms for killing seven female prostitutes in Milwaukee over a 21-year period ending in 2007. The 53-year-old Ellis was being held in a South Dakota prison under an interstate agreement.
An autopsy was planned, and South Dakota authorities will investigate his death. A prison official said he died from natural causes at a hospital in Sioux Falls.
Ellis never said why he killed the women. He was arrested in 2009, after Milwaukee Police learned that his D-N-A matched semen found on six of the homicide victims, plus a blood sample at the scene of the other murder. Two men were convicted of killing women who were later tied to Ellis. Those men were exonerated. A third man was tried and found innocent.
In an indirect way, Ellis helped law enforcement statewide, when his arrest exposed flaws in the state's system for collecting D-N-A samples from convicted felons. As it turned out Ellis persuaded a fellow jail inmate to submit his D-N-A under Ellis's name -- and in 2009, it was learned that over 12,000 criminal suspects throughout Wisconsin never provided their required samples. Those samples are in a database that police use to solve past and present crimes. This year, the state expanded the D-N-A collection requirement to include those arrested but not convicted of felonies and sex crimes, plus those found guilty of misdemeanors.