It appears as though Salah Abdeslam was found by a combination of security forces’ metadata research and a support network that couldn’t cook.
Salah went missing after he wimped out of “martyrdom,” ditching his suicide vest and calling friends to come pick him up and take him home. The car was stopped by the French, but their names weren’t available to the police yet.
Clearly, security forces are not sharing counterterrorism information fast enough to handle modern operations. A slow moving target like the Soviets, or even al Qaeda, allows for a more relaxed approach. ISIS’ operational tempo and behavior is too fast and haphazard.
The Molenbeek area where Salah had been hiding is riddled with radical support networks and sympathizers. He was able to rely on his friends and other support networks. Police targeted elements of these support networks, and eventually discovered a link to Salah himself.
Belgian and French police, who had worked intensively together since November 13, carried out a midday check on what they thought was a defunct terrorist safe house. The utility bills hadn’t been paid in months, officials said, leading police to assume the apartment in the Forest district of southern Brussels stood empty. The six person team didn’t expect to meet resistance and brought no police backup or special forces support.
When the police opened the door, they were shot at with a Kalashnikov and “a riot gun,” according to the Belgian authorities. Four officers were wounded, including a French policewoman. Heavily armed police pursued suspects across the rooftops. One gunman was killed. Two fled the scene, evading capture even though police had sealed off the area.
The “defunct” safe house had a glass with Salah’s fingerprint. Police developed a number of leads and ended up monitoring a house in the Molenbeek area.
Staking out the house, the police became convinced that a larger group of people was there after a woman who seemed to live there ordered several pizzas, according to two security officials.
Just like the raid on el Chapo Guzman was triggered by a large food order, it seems Salah’s capture was based on too many pizzas. Maybe fugitives might want to consider cooking at home, rather than ordering delivery.
It seems that significant parts of the manhunt were enabled by recovering and analyzing mobile phones used by the various suspects.
Aside from the fingerprint found, earlier raids on suspected terrorist hideouts brought other important leads, according to officials. Electronic devices confiscated in earlier raids helped authorities track Abdeslam down, said a Belgian source.
Once a suspect’s mobile number and sim card have been identified, investigators can then serve a court order on telecoms operators to track the number and card down to the nearest phone tower.
The location information generated by the mobile devices (phones and possibly tablets) enabled security forces to track not only individuals, but to map out their networks via e.g. co-location. Mobile phones, even when encrypted and even when using encrypted communications tools, still provide a rich source of intelligence information to security forces.
Modern connected society is a huge data source for the intelligence analyst. Social connections are mapped out via online social networks such as Facebook, but also via the mobility of personal tracking devices such as mobile phones. An underground operative, such as Salah, can avoid using mobiles and computers, but the various elements of his above ground support network are as reliant on modern tools as anyone else.
The problem for underground operatives is that they are reliant on support networks. Support networks for clandestine organizations are almost always based on social networks. Modern society makes support networks an open book for anyone with access to the data (social apps, telco records, etc) and the analytic tools to parse that data (eg Palintir, analysts notebook, etc).
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