PARIS - After nearly two years in solitary confinement at a maximum security jail, the top surviving suspect of the deadliest terror attack in recent French history goes on trial Monday in Brussels.

The four-day trial of 28-year-old Salah Abdeslam will not deal directly with the November 2015 attacks that killed 130 people around Paris, but rather a shootout with police months later. But it is being closely watched, in hopes it may shed insight into the tangle of alliances and events that link the Paris attacks with the March 2016 attacks on the Brussels airport and metro.

Top Paris Attacks Suspect on Trial for First Time, in Brussels

The trial may turn on whether Abdeslam, who has remained silent for months under round-the clock prison watch, will finally talk or even make a courtroom appearance.

Top Paris Attacks Suspect on Trial for First Time, in Brussels

"Will he say anything more than he has said?" asks Rik Coolsaet, a longtime terrorism expert and senior fellow at the Egmont Institute, a Brussels-based research group. "If he doesn’t, I’m afraid the trial will not make things much clearer about his involvement either in the Brussels or in the November attacks in Paris."

Top Paris Attacks Suspect on Trial for First Time, in Brussels

The trial directly deals with a March 2016 shootout with Belgian police that took place days before Abdeslam was arrested, after months on the run. He and accomplice Sofiane Ayari face attempted murder charges.

Abdeslam’s case comes amid a changing terror landscape in Europe. With the Islamist State group beaten back in Syria and Iraq, the focus is now on returning radicals and those leaving European prisons in the not-too-distant future. The Brussels trial is one of many expected during the coming months and years dealing with recent terrorist attacks across the region.

But while the trials may shed light on the past, "they won’t inform us much about the future threats and challenges," analyst Coolsaet says. "We are living in a kind of post-ISIS era, in which the threat has been transformed from organized networks of plots and attacks to lone actors."

A former pot-smoking petty criminal who once ran a bar in the Molenbeek neighborhood of Brussels with his brother Brahim, who blew himself up in the Paris attacks, Abdeslam seems an unlikely jihadist. His Belgian lawyer, Sven Mary, once characterized him as a ‘little jerk from Molenbeek’ with the "intelligence of an empty ashtray."

Yet Abdeslam is believed to have played a key logistical role in preparing the attacks. He allegedly organized safe houses, drove across Europe to pick up other suspects, and dropped off three suicide bombers to the Stade de France soccer stadium outside Paris, where they blew themselves up during a France-Germany game.

The stadium attack was the first in a string of shootings and bombings that took place across Paris on a warm November evening. The terrorists targeted bars, restaurants and the Bataclan concert hall before blowing themselves up or being shot dead by police.

But Abdeslam escaped, sneaking across the French border into Belgium the following day with the help of friends. Recent evidence shows his suicide vest was defective, although it remains unclear whether he intended to trigger it.

After a four-month manhunt, he was finally caught in the Molenbeek neighborhood where he grew up, just days after the shootout with police, who were investigating a suspected safe house they originally thought was unoccupied.

Days later, three bomb attacks on Brussels airport and the Maalbeek metro station killed 32 people. The suspected killers were closely tied to the Paris attackers. Abdeslam, who initially talked during interrogations, and gave misleading information, has kept silent since.

His silence ultimately led both Belgian lawyer Mary and Abdeslam’s French lawyer Franck Berton to give up his defense a few months later. Berton blamed the round-the-clock surveillance for eroding Abdeslam’s mental stability, and warned his former client was "radicalizing in an extreme fashion." In December, Abdeslam finally tapped Mary to resume his defense for the Brussels trial.

Many questions remain about the Brussels and Paris attacks, among them the whereabouts of onetime Syrian jihadist and suspected coordinator Oussama Atar. An international arrest warrant is still out for Atar who, like Abdeslam, is a Belgian national of Moroccan extraction (although Atar is bi-national). He is also the cousin of two of the Brussels suicide bombers.

The French and Belgian attacks were only the beginning of several killings across Europe that targeted Germany, Britain, Spain and the French Riviera city of Nice. Last month, the first trial relating to the 2015 Paris attacks opened in the French capital. Three suspects are charged with assisting or being aware of the assailants’ whereabouts.