INVESTIGATED
Verb
investigated
simple past tense and past participle of investigate
Source: Wiktionary
INVESTIGATE
In*ves"ti*gate, v. t. [imp. & p. p. Investigated; p. pr. & vb. n.
Investigating.] Etym: [L. investigatus, p. p. of investigare to
investigate; pref. in- in + vestigare to track, trace. See Vestige.]
Definition: To follow up step by step by patient inquiry or observation; to
trace or track mentally; to search into; to inquire and examine into
with care and accuracy; to find out by careful inquisition; as, to
investigate the causes of natural phenomena.
In*ves"ti*gate, v. i.
Definition: To pursue a course of investigation and study; to make
investigation.
Source: Webster’s Unabridged Dictionary 1913 Edition