Certainly, but in this case, the tip made to the police was based on the fact that the pilot smelled of alcohol.
Acording to the previously quoted spokeswoman for the police that is:
http://www.vg.no/pub/vgart.hbs?artid=127113
- Det kan også ha vært oppførsel, men tipset gikk først og fremst ut på at mannen luktet alkohol, sier Grunde.
Translates into:
"It may also have been the behaviour, but the tip was primarily based on the pilot smelling of alcohol, Grunde says."
Furthermore, the article states that it was the screeners at a security-checkpoint that noted the smell and notified the police.
It appears that they did indeed find a pilot, as the flight, PK772, landed in Copenhagen at 03:24lt, 25 hours late....
