They questioned him for six hours, but ultimately no arrests were made.
The only suspect so far has returned home in the investigation into the murder of Thomas Bricca, the 19-year-old boy killed a month ago in Alatri, in the province of Frosinone, with a gunshot.
The suspect is one of the two brothers who a few days ago presented themselves to the carabinieri to make spontaneous statements to the military about the ambush in which young Thomas was killed in a tragic mistaken identity.
At the prosecutor's office in Frosinone, therefore, the young man of the same age as the victim presented himself to be heard by the magistrates.
It is one of the people indicated by the witnesses of the murder themselves.
In particular, it was Omar who pointed the finger at the suspect's family, a friend of Thomas who was convinced that the killers had come for him that evening.
To deceive whoever pulled the trigger would have been the color of the jacket, the same as Thomas's.
At the end of the long interrogation, in which the times and times of that evening would have been thoroughly examined, the prosecutors did not stop anyone, but the position of the young man - and that of his brother and father - are still being examined by the investigators.
The investigations continue.
What now seems established in the story is the reason behind the deadly ambush: apparently, a retaliation after the clashes between rival groups of boys that took place in the Ciociaria town a few days before Thomas was killed.
The previous Saturday night one of the boys was even pushed over a balustrade, ending up on the ring road.
The drop, according to what has been reconstructed, which would have triggered armed retaliation.
But some fundamental elements to reconstruct the puzzle are still missing: the weapon has not been found, to begin with.
According to the experts it would be a drum pistol, which in recent days has been searched extensively by the carabinieri.
And then the scooter on which two people would have approached Thomas's group and then fired is missing.
Thorough research is also underway on the scooter, which was captured by city cameras, but there is a suspicion that it may have been destroyed.
In the meantime, the city is asking for "justice" for the boy from social networks.
Thomas's father, Paolo, has been sharing articles about the investigations on his Facebook profile for days, alternating them with messages of solidarity and closeness that come to him from friends and acquaintances.
Even Thomas's uncle, Lorenzo Sabellico, does everything to keep attention on the case.
On Wednesday at 18 in Alatri, the man recalls, there will be a torchlight vigil to remember the boy: "Appointment in the square - writes his uncle - Alatri marches, justice for Tommy".