Every think tank knows what is up .. they never go the distance to make it stick.
They dwell in the ”possible” and the ”may be”.
Action prone tall and handsome actually does the headless action.
The tall and blonde girl goes as a supporter.
Velma just lacks tha command skills to make informed reports to the headless jock running the whole shabang.
Being right is nothing unless you are sherlock, colombo, poirot, vidocq ... all the others not into the law enforcement loop,
like writers, the devil (Lucifer), the wincesters (supernatural) have to deal with the constant lack of authority.
Even Constantine is often sidelinded by archangels or cops while understanding he is great help.
Everybody being a sceptic and doing the actual exorcism of foul play appearences is left out of actual button pushing
... but they get the last words.
So Velma has the last words, useless last words, that is.
Then at the end reveal, she's like "I knew it!"