Where does the wand go?

[James Casey]

No: HPFGUIDX 177134

Given that some wizards do use their wands to "turn" where does the
wand go when they do transform? Just something I find humorous. But my
real question when asking if Black needed a wand to transform is really
a question of how much majic can be performed in Azkaban? To delve more
into this how do the witches and wizards who do escape get their wands
back? We know that some do emerge having escaped Azkaban with their own
wands.

James Casey