 Imola District Courthouse  |
| Antonio Costanzo | | Judge |
|
| Bologna Prosecutor's Office |
| Maurizio Passarini | | Prosecutor |
|
 Member of the Prosecutor's technical investigative team  |
| Francesco Bomparole | | Representative of state road contractors |
| Alberto Bucchi | | Professor at Bologna University |
| Giampaolo Cammarota | | Professor at Bologna University |
| Enrico Lorenzini | | Professor of Engineering at Bologna University |
| Roberto Nosetto | | ex-President of Imola circuit |
| Antonio del Monte | | Doctor of Italy Olimpic Committee |
| Mauro Forghieri | | ex-Ferrari Technical Director |
| Tommaso Carletti | | ex-Ferrari race Engineer |
| Emmanuelle Pirro | | ex-F1 Driver |
| Marco Spiga | | Electronics Engineer |
| Andrea Hallgas | | Liutenant of The Military Aviation |
|
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| Bologna Police Department |
| Investigated the accident with Prosecutor's Office |
|
| Accused |
| Williams Team |
| Frank Williams | | Team Owner |
| Patrick Head | | Team technical Director |
| Adrian Newey | | ex-Team head Designer |
 Williams Defenses  |
| Oreste Dominioni | | Attorney |
| Peter Goodman | | Attorney |
| Edda Gandossi | | Attorney |
| Michael Breen | | Attorney |
| Adrian Newey Defenses |
| Luigi Stortoni | | Attorney |
| Lanzi | | Attorney |
| Williams Investigative Team |
| Giorgio Stirano | | ex-Williams Engineer |
| Diego Milen | | ex-Williams Engineer |
| Tony Pilcher | | Responsible for production at Williams Team |
| Max Nightingale | | Responsible for aerodynamics and the power steering at Williams |
| Simon Wells | | Responsible for hydraulic tests at Williams |
| Robert Vitali | | Williams Engineer |
| Augusto Suppo | | Williams Engineer |
| Gary Woodward | | Williams Engineer |
| Simon Scoin | | Responsible for download of telemetry data at Williams |
| Brian O'Rourke | | Responsible for compound materials at Williams |
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| FIA |
| Roland Bruynseraede | | Race Director |
| FIA Defense |
| Robert Causo | | Attorney |
|
| SAGIS |
| Federico Bendinelli | | President of SAGIS |
| Giorgio Poggi | | Track official Director |
| SAGIS Defenses |
| Roberto Landi | | Attorney |
| Colliva | | Attorney |
| Manrico Bonetti | | Attorney |
| SAGIS Investigative Team |
| Giavotto | | Engineer at Milan Institute of Technology |
| Marchionna | | Engineer at Milan Institute of Technology |
| Corrado Cipolla | | Pathologist |
|
| Main Witnesses |
| Mario Casoni | | Driver of the safety car |
| Alan Young | | Williams Engineer |
| Gavin Fisher | | Williams Engineer |
| Stefano Stefanini | | Bologna Police Department |
| Pierluigi Martini | | ex-F1 Driver |
| Michele Alboreto | | ex-F1 Driver |
| Bernard Duffort | | telemetory engineer of Renault |
| Fabrizio Nosco | | in charge of Safety Inspection at Imola |
| Charlie Whiting | | FIA race delegate |
| Michele Romanelli | | Coroner |
| Ricci | | Coroner |
| Alan Woolard | | FOCA TV Director |
| Eddie Baker | | FOCA TV Producer |
| Andy James | | FOCA TV Switcher |
| Giancarlo Tommasetti | | RAI Director |
| Francesco Longanesi Cattani | | executive at FOCA Public Relations |
| Damon Hill | | incumbent F1 Driver |
| David Coulthard | | ex-test Driver for Williams |
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