Calipari was returning from a successful rescue mission to liberate Giuliana Sgrena, an Italian independent journalist, detained by Iraqi insurgents.
Lozano and members of his squad had been directed to set up the blocking position as part of security measures for Ambassador John Negroponte's convoy from the city to the airport.
[citation needed] A related report[4] and issued by Italian authorities, rather than accusing Lozano of being the sole culprit, pointed to the inappropriate placement of the blocking position (at the end of a one-way ramp between two highways) and lack of proper warning signals and/or concertina wire.
In this video, Calipari's car is seen stopped on the road after the shooting, with the door open, the lights switched on, and apparently more than 50 meters away from the US Army Armored Humvee.
Italian Prime Minister Silvio Berlusconi indicated in Parliament on May 5, 2005, that the government remained fully committed to supporting the ongoing judicial investigation into Calipari's death.
One of the most prominent leaders of the opposition in the lower house of parliament, Piero Fassino, called for the United States to facilitate cooperation with the investigation, indicating that they believed the U.S. Army should produce Lozano for questioning by the prosecuting magistrates.
Alfonso Pecoraro Scanio, head of the Italian Federation of the Greens, indicated that should the United States fail to cooperate with this investigation by allowing Lozano to be questioned, he would push for a hearing at the International Court of Justice.
[citation needed] Putting foreigners on trial in absentia is a relatively uncommon practice in Italy, but exceptions are made for cases of "political murder".
[citation needed] On April 10, 2007, Lozano gave an interview to CBS Television in which he appeared deeply concerned about the legal proceeding in Italy, and very sorry about the "pain he'd provoked to the family of Nicola Calipari".