You mean other than that it is the correct word in the correct context? One scours interviews for particular items just as one scours the countryside for lost children.
Since neither “scored” nor “secured” makes any sense in the context, this is an Occam’s Razor violation. One doesn’t score interviews for particular items nor does one secure interviews for particular items. You might as well suggest that the author meant “scared”. The only possible typo that would make sense is “scanned”. One can scan interviews for particular items, but “scour” implies a more thorough search than “scan”. Other possible expressions are “comb through” and “rake over”, but these are getting beyond the range where they could be considered typos.