Not necessarily. They are often called in on abduction cases because smaller departments often don't have the resources that the FBI does. Including staff, labs, ballistics catalog and social media/internet techs.
After contact the soeacial CARD team has a rep in site within 1-2 hours. They are trained and home based throughout regions and then cities for maximum coverage.
We saw them in very short in the missing family of 4 in Kenai Alaska. Those people are super intelligent, organized and trained extremely well. Within a very few minutes after reviewing the files they had 3 scenarios and direction that search and Case would take. Other than having to send for heavier hiking boots and a couple warmer coats(which were loaned) they hit the ground running and did an exceptional job.
I might add the bodies of the 4 and the dog were missed in 5 foot high grass by a few feet. The search area is difficult for moose to transgress let alone locate anything. It was sad it took months to find them and my neighbor died during that time. She was the mother’s grandmother.
But I can’t say enough about the feds. When the search scaled back, the team stayed but left a very experienced member. until the snow was to deep to walk or ride through.
There were people on foot, 4x4s, on horse AND DONKEY back, atvs, scooters, motorcycles and throughout the heavy snowfall. Boats can use and park campers all searched.
The mother two girls and the dog were all shot by the mother’s boyfriend.
Searchers walked by them several times. They laid just 18 feet of a direct well used trail.
I became side tracked. My point is that a small contingency of highly specialized agents from different divisions were in Kenai. The City Police and many of us who have searched for lost hunters and fishermen absorbed the methods used and looking at suspects and why.