Betz had been placed in charge of a small fleet of aircraft at the Tempelhof Airport; making sure the planes were flight ready.

Further, he was tasked with making a list of staff personnel to be flown out of Berlin to Obersalzberg, after Hitler gave the word to do so.

[2] On 20 April Hitler ordered Albert Bormann, Admiral Karl-Jesko von Puttkamer, Dr. Theodor Morell, Dr. Hugo Blaschke, secretaries Johanna Wolf, Christa Schroeder, and several others to leave Berlin by aircraft for the Obersalzberg.

[3] Thereafter, Betz was in charge of overseeing the construction of an emergency air strip near the Brandenburg Gate for use by the Führerbunker personnel.

That evening in the bunker complex below the Chancellery garden, Betz was present with Baur when Hitler said his farewell to his personal pilots.

[6] General Helmuth Weidling, commander of the Berlin Defence Area, and SS-Brigadeführer Wilhelm Mohnke, the (Kommandant) Battle Commander for the centre government district, devised a plan to escape out from Berlin to the Allies on the western side of the Elbe or to the German Army to the North.

[8] After midnight on 2 May 1945, Betz was part of a large group of German soldiers and civilians who crossed the Weidendammer Bridge while under heavy fire from Soviet tanks and guns.

[9] According to Erich Kempka, he came across the badly wounded Betz and left him in the care of Kaethe Hausermann, a dental assistant who had been on Hitler's staff working with Dr. Hugo Blaschke.