They have reached a new low by going after family members.
It seems like anyone with money can hire an (wannabe) assassin nowadays to kill someone in the Montreal Mafia and create chaos. Doesn't seem like the all-powerful 'ndrangheta from Ontario would be behind this.
What could be the case is that there is an open contract out on Del Balso and these guys decided to collect it..
The open contract concept make sense. There is no other way to justify this.
On second thought, was it not Del Balso that rented an helicopter and start to shoot at the D'Amico's house with an AK-47. If he gets another parole,he may go ballistic again for having gone after his wife and children.