The only thing that surprises me about this story, is how long it took the Italians to cotton on to the fact that he'd brought a massive amount of cash into the country under "diplomatic cover". Even if Fuat Avni's figure had been exaggerated (and he's proved pretty accurate over the years), it's still an awful lot of spendies to take for a wee Italian break.
I'm not sure Turkey allows for what we would call "by elections", but get the feeling that if they did, Erdogan jnr would find himself as an AKP deputy to avoid any form of domestic prosecution.
JF