investigate

analyze analyzes anatomize ask assay audit bird-dog bird-dogging canvass challenge challenges check out check checks out checking out comb contextualize covers cover cross-examine debrief debriefing delve diagnose diagnosed dig dissect dug enquire enquiring examines examine following up follow up follows up followed up go over go through goes through hunt inquire inquires inspect interrogating interrogate look into looking into looked into looks into pried prospect prospected pry questions question quiz quizzes ransack research researching scanning scanned scan scrutinize searches search see seek seeks sift study take on takes on test tests took on tries try went through went over