Luftwaffe claims 27.07.41

Not long ago my flying school mate asked me to help him with his uncle, who MIA being a Petlyakov Pe-2 gunner.
As to his uncle's family records he was missed on 27 Jul 1941 somewhere in Rzev outskirts. His bomber was shot down by Luftwaffe fighters. Navigator bailed out, a pilot tried too, but the plane tail broke off and he had no enough altitude to survive (was buried in a chute). The gunner wasn't found at all. Military arhive records we looked through were useless to give us the place of the incident.
Is it possible to find out Luftwaffe claims over Pe-2 (or 2-motor bombers) nearby Rzev on the date? I hope there are records with coordinates of a shot down Pe-2, so we can send a rescue party in these regions and try to find a pilot grave or some eyewitness if any.