Leclerc, who was targeted while in the Italian coastal town, was robbed of his Richard Mille watch, valued at around €2.5 million (£2 million).
Authorities believe the trio carefully orchestrated the attack, with two men directly confronting Leclerc, while others acted as lookouts to ensure the robbery went smoothly, according to Il Vaporetto.
Leclerc's Richard Mille robbery
The crime, which involved the use of a scooter and a rented SUV, was captured on various CCTV cameras, allowing investigators to piece together the details of the meticulously planned heist.
The stolen watch, known for its association with high-profile athletes and its exorbitant price tag, made headlines around the world.
The investigation, which included extensive analysis of surveillance footage and witness interviews, uncovered a series of additional criminal activities linked to the same group.
On the same night as the Leclerc robbery, the men attempted another watch theft near Forte dei Marmi, targeting a €40,000 Rolex Daytona.
Although that attack was foiled by passers-by, it added to the list of crimes attributed to the group.
The robbers were also accused of trying to rob a British manager earlier that same evening, threatening him with a firearm in yet another violent attempt to steal a valuable watch.
Following a lengthy trial, the court handed down significant sentences to the perpetrators, equating to around 28 years between the three men originally, but around 22 years following an appeal by the perpetrators.