Rome, December 28 - The Democratic Party is welcoming outgoing national anti-mafia prosecutor Piero Grasso as a candidate in February's election, party leader Pier Luigi Bersani announced Friday. "We chose to put two words - morality and work - before the legislature and the rule of law as a top priority for our country," said Bersani, whose party is currently leading polls, after meeting with Grasso. The participation of Grasso - who announced his resignation from the judiciary Thursday - would help drive a "civic resurgence", Bersani said, while Grasso urged a "gradual revolution" of the justice system. Formerly Palermo chief prosecutor, Grasso was named head of Italy's Anti-Mafia operations in 2005 replacing Pier Luigi Vigna. As Palermo prosecutor, Grasso tracked down a string of top mobsters and moved ever closer to the biggest catch of all, Bernardo Provenzano, a fugitive who had been running the Mafia for most of his 42 years in hiding. Grasso worked on anti-Mafia cases in the early '90s and coordinated investigations into the 1992 bombs that murdered Italy's top two anti-Mafia invesigators Giovanni Falcone and Paolo Borsellino and, a year later, attacked cultural and religious targets in Rome and Milan. Grasso is the second anti-mafia prosecutor planning to run for office following an announcement by ex-Palermo prosecutor Antonio Ingroia last week saying he will lead leftist representatives of civil society.