For a detailed discussion of this accident video here on Pprune see:
BO105 fatal accident back in 2006(?)
Karl "Charly" Zimmermann
Siegfried ("Siggy") Hoffmann (sometimes referred to as Hofmann, or even Hermann)
Siegfried ("Siggy") Schwarz
Plenty of room to get confused. Too many 'mann's, and too many 'gy's. The only thing I am pretty sure of is that Siggy Schwarz is doing well.