Jellybean Johnson posted that Walker died. From Walker's FB (bio) page:

WEE WILLIE WALKER was a member of the gospel group the Redemption Harmonizers when he left Memphis and headed to Minneapolis in 1960. He defected with a fellow band mate and has kept the Twin Cities his home. Since then his voice has been featured in the Royal Jubileers, Willie & The Bees, The Valdons, Salt, Pepper & Spice, We “R,” the Butanes and along side Paul Metsa as well many other performances with the Twin Cities blues and soul contingency. On subsequent visits back to Memphis in the 60s, Willie’s reputation landed him recording dates with the legendary Goldwax Records. He cut nine sides there and Goldwax leased four of them to Checker Records, a subsidiary of Chess Records.

Willie brought Memphis to Minneapolis. His carefree attitude is true South. His voice can be placid as the Mississippi backwaters or it can churn up the mud from its greatest depths. And it all comes so naturally for the man.

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Just last year, there were articles about a small resurgence of his career.