unsuspicious

[…] he his guide requested

(For so from such as nearer stood we heard),

As over-tired, to let him lean awhile

With both his arms on those two massy pillars,

That to the arched roof gave main support.

He unsuspicious led him; […]

The skeletons in this sport’s hitherto unsuspicious closet belong to upward of a dozen top-notch show jumpers, all insured for $50,000 to $250,000, all killed by a hitman-for-hire in an insurance-fraud scheme perpetrated by some of the most sterling names in the business.