The quotation is supposed to be from Diogenes Laertius' epigram about Aristotle (D.L. 5.8 = Greek Anthology 7.107.4), but the noun actually used there is sukofa/seis (accusative plural of the feminine abstract noun suko/fasis). The alternative the Suda offers -- which looks like the accusative plural of an omicron-stem noun -- is hardly Greek and is unattested elsewhere. The Suda compiler then compounded his error (as Bernhardy realized) by glossing it with sukofa/ntas ('accusers'/'informers'/'calumniators') rather than the required sukofanti/as ('accusations'/'calumnies').
The four-line epigram as a whole purports to describe how a priest called Eurymedon was about to indict Aristotle for impiety, but A. evaded this by drinking hemlock. Eurymedon and the (intended) prosecution seem to be real (cf. Athenaeus, Deipnosophists 15.696B = 15.51 Kaibel), but Aristotle's death by hemlock is a Socrates-based myth.