SS-Sturmbannführer Dr. Karl-Heinz Knapp Vermisst 1945

One of the officer I am researching is the SS-Sturmbannführer Karl Heinz Knapp, the reason why I research him is as that he served in the KL Sachsenhausen which is my main subjet of Interesst.
What I have understood is that he was later in the war highly appriciated as Officer and Doctor, Unfortunately I don´t know much about him from his time in KL Sachsenhausen. But hopefully I will publish my book about men from the KL Sachsenhausen and there you will read more about him.

SS-Sturmbannführer Karl-Heinz Knapp

Born - 23.3.1913 in Hamborn
Vermisst - 5.1945

SS-Stubaf: 20.4.43
SS-Hstuf: ?
SS-Ostuf: 30.1.39
SS-Ustuf: 30.1.38

SS-Nr.: 226015
NSDAP-Nr.: 2034178

Letzte Einheit - 2./SS-San.Abt. 18 Horst Wessel Kp.Chef