The renewed interest in the unsolved DiPietro homicide and the recent drug case has South Philly wiseguys on edge. Sources say several have been observed in recent days “walking and talking” in the exclusive Packer Park neighborhood and at the nearby Reserve development.

There is no word on whether any cooperating witnesses, besides known Mob snitch Anthony Persiano, contributed to this investigation, although mob insiders believe more information on that will become public as this case unfolds.

Sources say more arrests are expected.