A second man has been arrested in connection with the death of a man who was discovered in Wooburn Common.
The 36-year-old man from West London is custody at Aylesbury police station.
A 32-year-old man, also from West London, who was arrested on suspicion of murder yesterday remains in custody at this time.
Pheasant beaters discovered the body of 44-year-old Ryszard Karpuc from West Ealing, London, on Saturday.
His death is still being treated as unexplained.
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The victim of an assault in Cippenham was flown to hospital by air ambulance this afternoon.
A rapid response vehicle, an ambulance officer, an air ambulance and an ambulance crew were all called to an address in Earls Lane at 2.10pm.