Police say found three members of gang who freed lifer
Cutri', murder convict with mafia links, still on run06 February, 10:54
The police said they have "serious evidence of guilt".
The inmate's 30-year-old brother, Antonino, died of his wounds in hospital after being hit by prison guards in a shoot-out during the breakout Monday north of Milan, while two prison guards were injured in the attack.
A nationwide manhunt is still on for Domenico Cutri', who was serving a life sentence.
The 32-year-old was convicted on appeal in December 2012 of planning the murder of Luckasz Kobrzeniecki, shot to death outside his house in Trecate on June 15, 2006.
The gunman, Manuel Martelli, got 16 years and four months in an unappealable fast-track trial.
Cutri', an alleged affiliate of the Calabria-based 'Ndrangheta mafia, decided to murder Kobrzeniecki because he was bothering his girlfriend.