cross question
— Verb
– English
～ question closely, or question a witness that has already been questioned by the opposing side; "The witness was cross-examined by the defense"
calling into question
— Noun
– English
～ a challenge to defend what someone has said
cross-question
— Noun
– English
～ a question asked in cross-examination
cross-questioner
— Noun
– English
～ someone who questions a witness carefully (especially about testimony given earlier)