Cali, 53, was shot several times in the Todt Hill district of Staten Island on Wednesday evening and died later in hospital.
An alleged mafia boss has been reportedly been shot and killed outside his home in NY.
No arrests have been made in connection with the shooting.
The reputed boss of the US Gambino crime family was shot to death in front of his NY home by a gunman who may have staged a auto accident to lure him outside, dying a virtual unknown compared with his swaggering 1980s-era predecessor, John Gotti.
The body of former mob boss John Gotti is carried from Papavero Funeral Home in the Queens borough of NY 15 June 2002.
Cali, who had Sicilian lineage, is part of a "resurgence" in mob activity and reportedly concentrated on the heroin and OxyContin trade, according to The New York Post.
"There are no arrests and the investigation is ongoing", police said in a statement.
Later, in November 2008, Weinstein lowered the prison term to 16 months after prosecutors recalculated the victim's loss as $8,000, not $13,000.
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In 2008, Cali was arrested and charged with federal racketeering as part of Operation Old Bridge - a code name for the February 7 arrests in Italy and the US that targeted the Gambino crime family.
"There were like six shots, and then there were three more", one witness, who asked that her name not be used, told The New York Daily News.
Meanwhile, on March 13, two heads of the Bonanno family, Joseph Cammarano Jr. and John Zancocchio, were acquitted in court on conspiracy and racketeering charges, the New York Times reported.
"Frank Cali was a pretty likeable guy, and also this is not a way the mob would kill one of their own", he said.
Cali kept a much lower profile than Gotti and was killed in far less spectacular fashion than Castellano.
Last October, Bonanno crime family associate Sylvester Zottola, 71, was gunned down at a Bronx McDonald's drive-thru as he waited for a coffee. Today's news is a big flashback to those days.
The newspaper cited a past report saying Zito's still-living older brother, Anthony, has ties to the Lucchese crime family and was jailed in the 1970s for extortion.
"Papa! Papa!" one man cried before laying down on the grass, sobbing, the witness recounted.