Ralph Boelter was the new man leading the Minneapolis FBI office nearly four years ago when Somali families began reporting that their sons were disappearing, sometimes in the middle of the night.
It didn't take long for this former Marine and street cop, who looks like he came right out of G-man Central Casting, to mobilize what became one of the largest counterterrorism investigations since the attacks of 9/11.
Now, he is taking that expertise to Washington as the FBI's deputy assistant director in charge of counterterrorism.
Boelter said he plans to transfer a prime lesson learned here to his new job overseeing counterterrorism strategy: To combat extremism, the FBI needs to build solid, sincere relationships with the community.
"We had to be able to show people they could trust me, trust us," Boelter said of the local effort that eventually bore fruit.
Young men have been killed in the fighting. Others have been jailed and indicted. The investigation is ongoing, and Boelter said he cannot go into much detail.
But without the efforts of the local FBI to add community outreach to its terrorist-hunting role, several observers say boys might still be sneaking away -- and dying.
"He showed a side to the FBI that people don't see," said Minneapolis Police Chief Tim Dolan. "They needed that. They needed a little more to make their case. And it paid off because of the connections he made. People came forward. He became somebody that they were willing to go to."