From Killers to Canaries: 11 Hitmen Who Turned Informants
In the shadowy underworld of organized crime, hitmen operate as the silent enforcers, carrying out murders on behalf of mob bosses and criminal syndicates. Their loyalty is bought with cash, fear, and the promise of protection. Yet, history is filled with cases where these professional killers shattered that code of silence, turning state’s evidence to save themselves. These betrayals not only exposed vast criminal networks but also delivered long-overdue justice for victims and their grieving families.
What drives a hired killer to become an informant? Facing life sentences or the death penalty, many chose cooperation over oblivion. Their testimony dismantled powerful crime families, leading to hundreds of convictions. From the brutal streets of 1930s Brooklyn to the glitzy casinos of Las Vegas, these 11 real cases reveal the fragility of omertà—the Mafia’s vaunted oath of silence—and the profound impact of one man’s decision to talk.
Each story honors the victims whose lives were cut short, highlighting how informant flippers helped hold perpetrators accountable. These accounts draw from court records, FBI files, and investigative journalism, underscoring the analytical lens through which we examine organized crime’s downfall.
1. Abe “Kid Twist” Reles: Murder Inc.’s Betraying Butcher
Abe Reles rose through the ranks of Brooklyn’s Jewish and Italian mobs in the 1930s, becoming a key operative for Murder Inc., the enforcement arm of Lucky Luciano’s National Crime Syndicate. A small-time thug turned proficient killer, Reles was implicated in at least six murders, including the savage beating and strangulation of loan shark Irving “Big Gaze” Goldberg in 1936. His methods were crude and vicious, often involving ice picks, garrotes, and dumps into the sea.
Arrested in 1940 for the murder of small-time hoodlum Red Cassidy, Reles faced execution. From his perch at the Half Moon Hotel in Coney Island—under heavy police guard—he spilled secrets for 17 months, implicating over 80 mobsters in 85 killings. His testimony led to six convictions and death sentences before his mysterious “suicide” plunge from a hotel window in November 1941, widely suspected as a mob hit. Reles’s cooperation crippled Murder Inc., bringing closure to families like that of George DeFeo, a candy store owner gunned down in 1936.
2. Joseph “The Animal” Barboza: The First Big Mafia Rat
Joseph Barboza, a Portuguese-American enforcer for the Patriarca crime family in New England, earned his nickname through ferocious brutality. In the 1960s, he carried out hits like the 1965 slaying of Providence mobster Ronald Remeta, shotgunned in his car, and the 1966 murder of Edward “Punchy” Gilroy, a rival gangster. Barboza’s tally included at least 26 killings, often for meager fees.
Captured in 1967, Barboza flipped almost immediately, becoming the first top-level Mafia informant. Testifying against Raymond Patriarca Sr. and others, he detailed the family’s operations, leading to convictions in major trials. Relocated under witness protection as “Joseph Bentley,” Barboza was gunned down in 1976, likely by vengeful mobsters. His betrayal shattered New England’s Italian underworld, vindicating victims’ families and paving the way for future defectors.
3. Angelo “Big Ange” Lonardo: Cleveland’s Repentant Executioner
As underboss of the Cleveland crime family, Angelo Lonardo orchestrated hits in the 1930s, including the 1933 murder of Danny Grecco, a Jewish gangster killed on Lonardo’s orders amid a gang war. His hands were stained with blood from enforcing the family’s rackets in gambling and extortion.
Indicted in 1983 for racketeering, the 74-year-old Lonardo turned informant, providing unprecedented testimony on the national Mafia commission. He detailed 20 murders and helped convict bosses like James Licavoli. Lonardo’s cooperation, motivated by a late-life religious conversion, led to over 20 indictments. He lived under protection until his death in 2006. His insights dismantled interstate mob ties, offering solace to victims like Grecco’s kin.
4. Jimmy “The Weasel” Fratianno: Hollywood’s Snitching Gunman
James Fratianno, a Los Angeles mob hitman, eliminated rivals for the Chicago Outfit’s West Coast operations. Notable kills included the 1949 murder of gambling figure Nick Licata’s associate and the 1977 hit on Jimmy Hahn, a union official, ambushed in his car.
Facing murder charges in 1977, Fratianno became the highest-ranking Mafia informant at the time, taping conversations that exposed corruption. His testimony convicted over a dozen mobsters, including boss Jack Dragna’s successors. Relocated with a new identity, he died in 1993. Fratianno’s flip exposed Hollywood’s mob infiltration, aiding justice for Hahn’s family and others.
5. Vincent “Fish” Cafaro: The Genovese Enforcer’s Fall
Vincent Cafaro served as a feared capo in the Genovese family, handling hits like the 1981 murder of Sicilian mobster Lorenzo Mannino, garroted and dumped in a Bronx lot. His role in construction rackets funded his violent enforcement.
Arrested in 1986, Cafaro cooperated, wearing a wire that captured boss Vincent “Chin” Gigante’s rants. His testimony contributed to the 1992 Commission Trial convictions. Cafaro’s detailed accounts of 1970s-80s murders helped secure justice, passing away in protection in 1989. Victims’ advocates praised his role in weakening the Genovese stronghold.
6. Frank Cullotta: Tony Spilotro’s Vegas Traitor
Frank Cullotta led the “Hole in the Wall Gang” in 1970s Las Vegas for Chicago Outfit’s Tony Spilotro. He masterminded the 1979 murder of casino executive James Miraglia, stuffed in a trunk, and attempted hits like the Barbara Stupak beating.
After a 1979 heist gone wrong, Cullotta surrendered and flipped, testifying against Spilotro in the Las Vegas 19 trial. His evidence led to dozens of convictions, exposing casino skimming. Cullotta lived openly post-protection, consulting for films like Casino, dying in 2020. His cooperation protected Las Vegas from mob dominance, honoring victims like Miraglia.
7. Dominick “Baldy” Montiglio: Roy DeMeo’s Gambino Whistleblower
Dominick Montiglio, nephew of Gambino soldier Roy DeMeo, participated in up to 200 murders in the 1970s “Gemini Lounge” crew. Victims included Vincent Papa, dismembered in 1976, and Paul Rothenberg, tortured for debts.
Fleeing after DeMeo’s 1983 arrest, Montiglio testified in 1985, describing the crew’s body-part disposal methods. His words convicted Nino Gaggi and Anthony Senter, among others. Montiglio entered protection, aiding the dismantling of DeMeo’s reign of terror and closure for families of the Lounge’s dozens of victims.
8. Salvatore “Sammy the Bull” Gravano: Gambino Underboss’s Epic Flip
Sammy Gravano, John Gotti’s underboss, admitted to 19 murders, including the 1980 execution of Gambino soldier Vince Fazio and the 1970 slaying of Joseph Colucci. His efficiency made him a syndicate legend.
Turning in 1991 post-Gotti’s conviction, Gravano’s testimony sent Gotti to life in prison, detailing 30+ killings. It sparked the Mafia’s informant wave. Released in 2017 after prison, he faced further charges. Gravano’s cooperation toppled the Gambinos, delivering justice to victims’ loved ones.
9. Henry Hill: The Goodfellas Informant
Henry Hill, a Lucchese associate, aided in the 1970 murder of mobster Jimmy “The Gent” Burke’s associates and the 1978 Lufthansa heist killings, like that of courier Robert McMahon.
Arrested in 1980, Hill’s wire recordings and testimony convicted Burke and Paul Vario, exposing airport rackets. Immortalized in Goodfellas, he lived protected until 2012. Hill’s flip disrupted Lucchese operations, aiding families shattered by the heist’s violence.
10. Gregory Scarpa Jr.: Colombo Family’s Reluctant Rat
Son of hitman Greg Scarpa Sr., Gregory Jr. carried out Colombo hits, including the 1991 Rubout War murders like that of enforcer Larry Lampesi, ambushed in a car.
Indicted in 1992, Scarpa Jr. cooperated from prison, testifying against Victor Orena and Joey Russo. His evidence helped end the war, leading to multiple life sentences. Released later, his testimony brought stability and justice to war-torn families.
11. Anthony “Gaspipe” Casso: Luchese Boss’s Partial Cooperation
Anthony Casso, Luchese underboss, ordered 36 murders, including the 1989 “Windows” case hits on Gambino soldiers and cop murders via rogue detectives.
Captured in 1993, Casso briefly cooperated, implicating bosses before recanting amid credibility issues. His initial testimony fueled RICO cases against Luchese leadership. Sentenced to life, he died in 2020. Casso’s flip, though flawed, contributed to mob erosion and victim accountability.
Conclusion
These 11 hitmen, once feared predators, became pivotal in eradicating organized crime’s deadliest elements. Their testimonies resulted in hundreds of convictions, billions in forfeited assets, and a weakened Mafia structure that persists today. While their motives were self-serving, the outcomes honored victims—shop owners, rivals, innocents—denied justice for decades. These cases analytically demonstrate how internal betrayal, amplified by law enforcement, proves more devastating than any external force. In true crime’s ledger, the informants’ songs echo as a cautionary symphony of survival over silence.
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