"Can't we all get along?"
I think Fly's point that it's hard to tell complexion from old photos or movies is valid. Though that passport picture would also seem to be darker complected, so it may be moot.
The part I'm hung up on is: While I am very familiar with the descriptions that lead to the "olive"/"Latin"/"Native" description, if I saw the person in the Cooper sketches, I would not think "Latin" or "Native American." If his skin tone were notably darker than what feels in the realm for European-American, I might guess one of those things were in the mix. But it wouldn't be the first thing I'd say based on features.
So it seems completely in the realm to propose someone whose looks match the sketch and whose skin-tone could be described as "olive," etc. Yes? A credible suspect would be "A darker complected 'caucasian' whose features match the drawings," correct?
Otherwise, if we're dismissing the sketch as a match for features, we might as well be discussing Petersen, a nice-looking old man whose name is now permanently attached to a terrorist act he did not come within 3,000 miles of committing thanks to the crackerjack investigation of someone who coincidentally needed to sell tickets to a conference he personally profits from.