What is known about Mihalis Filopoulos beyond the events of that day is limited by the nature of how he became known. He was twenty-two. He supported Panathinaikos. He was, by the account of those events, someone who moved in the circles of supporters' culture that surrounded the club. Greek football fandom in the 2000s was intensely local and intensely felt — clubs like Panathinaikos and Olympiakos were not merely sports teams but tribal identities, particularly in Athens where the two clubs had co-existed in bitter rivalry for decades. Young men in their twenties were the heart of that culture. Filopoulos was one of them: not a name in the news yet, not someone whose biography would be written, just a young man who followed his team.

The confrontation at Paiania had been planned around an unlikely occasion. A women's volleyball match between Panathinaikos and Olympiakos was scheduled for March 29, 2007 in Paiania for the Greek volleyball cup. Women's events drew minimal police presence — the risk calculation was different from the men's football matches, which were routinely treated as high-security events. Supporters from both sides recognised the opening. News of the meeting circulated through club networks and websites; at least 400 people knew about it in advance. Groups assembled — Olympiakos fans in Peristeri, Panathinaikos fans in Halandri — and formed motorcycle convoys toward the town. The media would later call the gathering the "rendezvous of death." When the two groups met, Filopoulos was stabbed by two separate people and struck on the head with clubs by four more. He died from his injuries. The confrontation involved more than 500 people.

Greece's reaction was immediate and unambiguous. All team sport events were suspended from March 29 to April 12, 2007 — an extraordinary measure that underscored how seriously the government took what had happened. The suspension covered football, basketball, volleyball, and other organised competitions. The Ministry of Sports ordered all supporters' clubs closed and required background checks and identity verification before any club could reopen. Surveillance cameras were promised for all stadiums. Police raided club premises across Athens within hours of Filopoulos's death, seizing petrol bombs, knives, baseball bats, metal chains, slingshots, and flare guns. The raid produced evidence linking 28 people to the events at Paiania. In May, nine individuals were charged with accessory to homicide, including a member of Olympiakos's board of directors. Eighteen more faced lesser charges.

The legal proceedings that followed were halting and ultimately incomplete. In December 2007, it emerged that procedural errors in how suspects had been questioned by police — errors significant enough to invalidate statements, including confessions — resulted in the manslaughter case being archived. Charges proceeded only on lesser offences. The legal closure that Filopoulos's family and the public had expected did not arrive. Greek journalists and civil society groups would return repeatedly to the case over the following years as evidence of a systemic failure: not just the violence itself, but the impunity that allowed networks of organised fan violence to persist. In June 2023, one of the men originally charged in the case, Vasilis Roubetis, was shot dead near his home in Korydallos. By early 2024, Greek police had identified suspects in the killing, with arrests made in connection with organised crime networks. The events of March 29, 2007 continued to cast a shadow.

Fan violence in Greece is now commonly described in terms of before and after Filopoulos. The period before was one of escalating confrontations that were serious but somehow containable in the public mind. After, that framework no longer held. The scale of what happened at Paiania — the pre-planning, the numbers, the weapons, the filming of the attack and its distribution online — made it impossible to treat organised hooligan culture as a peripheral problem. The changes that followed were imperfect and incomplete, as such changes usually are. But Mihalis Filopoulos's name became attached to a moment when Greece was forced to look directly at something it had preferred not to see. He deserved better than to be known this way. He was twenty-two, and he liked football, and that should have been the beginning of a long story rather than the whole of it.