There were reports in Milwaukee's newspapers of Conrad Raster's death - in particular, I've indexed a clipping found in Milwaukee's German newspapers concerning finding the body. There would likely have been similar articles in the Milwaukee Journal or Milwaukee Sentinel.
"Milwaukee's German Newspapers; an index of death notices and related items" (1844-1950).
Gary Rebholz, compiler/editor
Indexing Milwaukee's German newspapers continuously since 2007... helping family researchers find their ancestors among Milwaukee's 99%.