Question: Under what president did William Cohen serve as Secretary of Defense in the years following the death of Esequiel Hernández Jr.?
Sentence (from "Esequiel Hernández Jr."): <ref name="Gwynne/Marfa"> </ref> Hernández was the first American civilian to be killed by active United States Armed Forces while they were on duty since the student massacre at Kent State University in 1970 and led to Defense Secretary William Cohen issuing a temporary suspension of troop patrols near the U.S.–Mexico border.
Relevant evidence: No