The attack has been attributed to the
NAR (Armed Revolutionary Nuclei), a neo-fascist terrorist organization. A long, controversial court case began after the bombing.
Francesca Mambro and
Valerio Fioravanti were initially sentenced to life imprisonment. The Supreme Court upheld the conviction of Luigi Ciavardini, an NAR member with close ties to Terza Posizione, in April 2007. Ciavardini received a 30-year prison sentence for his role in the attack. He had been arrested after the
armed robbery of the Banca Unicredito di Roma on 15 September 2005. Ciavardini was also charged with the assassinations of Francesco Evangelista on 28 May 1980 and Judge
Mario Amato on 23 June 1980. Semerari was murdered by the
Camorra a year later. The first trial began in Bologna on 9 March 1987. Massimiliano Fachini, Valerio Fioravanti, Francesca Mambro, Sergio Picciafuoco, Roberto Rinani and Paolo Signorelli were charged with murder. Gilberto Cavallini, Fachini, Fioravanti, Egidio Giuliani, Marcello Iannilli, Mambro, Giovanni Melioli, Picciafuoco, Roberto Raho, Rinani and Signorelli were charged with forming an armed gang. Marco Ballan, Giuseppe Belmonte,
Fabio De Felice,
Stefano Delle Chiaie, Fachini,
Licio Gelli, Maurizio Giorgi,
Pietro Musumeci,
Francesco Pazienza, Signorelli and
Adriano Tilgher were charged with subversive association. Belmonte, Gelli, Musumeci and Pazienza were charged with defamation. On 11 July 1988, Fachini, Fioravanti, Mambro and Picciafuoco were sentenced to life imprisonment for murder; Rinani and Signorelli were acquitted. Cavallini, Fachini, Fioravanti, Giuliani, Mambro, Picciafuoco, Rinani and Signorelli were convicted of forming an armed gang; Iannilli, Melioli and Raho were acquitted. Ballan, Belmonte, Felice, Delle Chiaie, Fachini, Gelli, Giorgi, Musumeci, Pazienza, Signorelli and Tilgher were acquitted of subversive association. Belmonte, Gelli, Musumeci and Pazienza were convicted of defamation. The new trial began on 11 October 1993. Massimiliano Fachini, Valerio Fioravanti, Francesca Mambro, and Sergio Picciafuoco were charged with murder; Gilberto Cavallini, Massimiliano Fachini, Egidio Giuliani, Valerio Fioravanti, Francesca Mambro, Sergio Picciafuoco and Roberto Rinani were charged with forming an armed gang, and Giuseppe Belmonte, Licio Gelli, Pietro Musumeci, and Francesco Pazienza were charged with defamation. On 16 May 1994, Fioravanti, Mambro and Picciafuoco were sentenced to life imprisonment; Fachini was acquitted. Cavallini, Fioravanti, Giuliani, Mambro and Picciafuoco were also convicted of forming an armed gang; Fachini and Rinani were acquitted. Belmonte, Gelli, Musumeci and Pazienza were convicted of defamation. On 23 November 1995, the Supreme Court upheld the convictions of Fioravanti, Mambro, Gelli, Pazienza, Musumeci and Belmonte, ordering a new trial for Picciafuoco (who was acquitted by the Appeals Court in
Florence on 18 June 1996, a verdict upheld by the Supreme Court on 15 April 1997). In April 1998, Mambro was given home confinement and allowed to leave prison during the day. In June 2000,
Massimo Carminati (NAR member), Ivano Bongiovanni (far-right sympathizer) and Federigo Manucci Benincasa (
SISMI officer) were convicted of obstruction. Carminati and Manucci Benincasa were acquitted for lack of evidence in December 2001, and Bongiovanni's conviction was upheld. On 30 January 2003, the Court of Cassation finally acquitted Carminati and Manucci Benincasa. In an article written by Alfio Bernabei for the British anti-fascist
Searchlight magazine in April 2022, it was reported that
"In a significant step in search for the truth behind the bombing at Bologna railway station that killed 85 people and wounded 200 on 2 August 1980 the far-right militant Paolo Bellini has been found guilty of direct involvement in the massacre. He has been sentenced to life imprisonment. The hearings at Bologna law Court began in April 2021 presided over by Judge Francesco Caruso with a number of lawyers acting on behalf of the Association of the Families of the Victims. Bellini, now 69-year-old, belonged to the far-right organisation Avanguardia Nazionale on whose instigation he killed a young left wing militant, Alceste Campanile, in 1975. In 1999, he confessed to this killing adding that he had also killed a number of people on behalf of mafia bosses. But he denied any involvement in the Bologna massacre." == Alternative theories ==