failed to inflict any damage to the airfield as five of the attackers were shot down, including two by Müller and two by Carganico. The Allied Convoy PQ 16, consisting of 35 merchant vessels headed from Hvalfjörður in Iceland to Murmansk from 21 to 30 May. At the same time, Convoy QP 12 with 15 freighters left Murmansk heading for Iceland. The convoys were sighted by German reconnaissance aircraft on 25 May 1942. Over the following five days, the convoys came under multiple attacks. On 30 May, JG 5 claimed 43 fighter aircraft and 7 bombers shot down. Matching these claims against Soviet records, the figures appear to be inflated. That morning at 09:20, Müller, Leutnant Heinrich Ehrler, Unteroffizier Hans Döbrich and another pilot each claimed a Hurricane fighter shot down. At the time and in the same area of this encounter, Podpolkovnik (lieutenant colonel) Boris Safonov, commander 2 GvSAP of the Soviet Naval Aviation, was shot down in his Curtiss P-40 Warhawk and killed in action. On 13 June, Müller claimed three aerial victories over Hurricane fighters from 78 IAP, one of which was the 500th claim filed by II. Gruppe. Müller received the Knight's Cross of the Iron Cross () on 19 June 1942 for 41 aerial victories. The presentation was made by Generaloberst Hans-Jürgen Stumpff at Petsamo, present-day Pechenga in Murmansk Oblast. By the end of September 1942, Müller was credited with 81 aircraft shot down. Müller injured his leg in a skiing accident in December that year, and after recovery was granted leave in Germany, returning to his unit in February 1943. On 8 March, Müller was carrying out a familiarisation flight on the new Messerschmitt Bf 109 G-2, which his Staffel was in the process of converting to, when the aircraft suffered an engine failure and crashed, with Müller suffering a concussion. He was shot down in his Messerschmitt Bf 109 G-2 (Werknummer 14810—factory number) by a Hurricane from 609 IAP on 19 April 1943 and was captured by Soviet forces. He was the highest-scoring German fighter pilot in the Arctic theatre at the time of his capture. Müller talked freely about himself and tactics during interrogation by his captors, and as a result was taken to nearby Soviet airfields to discuss fighter tactics with Soviet pilots before being sent to a Prisoner of War camp at Krasnogorsk, Moscow Oblast. On 21 October 1943 Müller