"Discretion is the better part of valor." That being true, give him the money/wallet/purse, whatever. However, THAT doesn't guarantee he isn't the "no live witness" type of fool that is running around nowadays.
IF that seems likely, going down blazing may at least save your partner and keep others from a similar fate in the future. Some instances have no set or even good outcome. My old habit of walking with my hand on my pocketgun, concealed (we used to carry our service revolvers in our field jacket pockets while making buys, one with his pointed at the dealer or other participants) might give me the opportunity to shoot first. ( I usually do this going into parking garages, dark lots, etc. but have been doing it for nearly forty years and think it gives you an edge in those instances)
IF that seems likely, going down blazing may at least save your partner and keep others from a similar fate in the future. Some instances have no set or even good outcome. My old habit of walking with my hand on my pocketgun, concealed (we used to carry our service revolvers in our field jacket pockets while making buys, one with his pointed at the dealer or other participants) might give me the opportunity to shoot first. ( I usually do this going into parking garages, dark lots, etc. but have been doing it for nearly forty years and think it gives you an edge in those instances)