Hauptmann Erwin Hemmerich (KIA 10.03.1945 - 19.03.1945?) is buried in the Rheinbrohl cemetery (Rheinbrohl is a municipality in the district of Neuwied, in Rhineland-Palatinate, Germany), grave 23.
To bad I'm just back from that area (I was at Andernach) I could have take a picture of his grave . . .
Details about his military career you can request at the Deutsche Dienststelle (WASt)
, just fill out an online tracing request and be patient . . . (will take 6 > 8 month's for a answer, if details are available)