In the absence of such reasons, the authorities have a clear duty to probe deeper and, where appropriate, issue bans.
Times, Sunday Times
I probe deeper - what was a bit too much?
Times, Sunday Times
Two further stories probe deeper into the ethics of justice and vengeance.
The Times Literary Supplement
He would reply by asking more questions intended to probe deeper into the issue.
Globe and Mail
The afternoons followed a similar pattern, enabling us to probe deeper into the delta each day and, at the same time, providing a fresh vista to go with every meal.
Times, Sunday Times