There is always that chance that Casella was close to the west side like most said.
But he may have been working with them for years ,everyone knows that the west side did get a lot from Philly family through the years.
He may have been feeding them the whole time for favors ...

Yep and Manna" knows and he is not squealing" Mix !

I know many of the old timers from Philly were close to Vito Genovese ...