The authorities are still seeking to corroborate what Mr. Marquez is telling them.
However, the inquiry will seek to corroborate Fox's assurances before sending a report to David Cameron, possibly within a week.
In a final step, we sought to corroborate our classifier-based findings by conventional event-related potential (ERP) analyses.
We therefore sought to corroborate our optogenetic findings with chemogenetic experiments, which are also more suitable for long-term stimulation.
Then teams on the ground with GPS equipment seek to corroborate the information and to collect missing data.
Seeking to corroborate Mr. Sarkisov's testimony, prosecutors have called 24 other witnesses, presented forensic evidence and read aloud transcripts of Mr. Krivoi's recorded prison telephone calls.
In recent weeks, prosecutors have sought to corroborate the material on the tapes, much of which remains unknown outside the independent counsel's office.
It is important that all allegations we receive, and evidence we gather, is fully tested and inquiries carried out to seek to corroborate, or otherwise, this information.
Seeking to corroborate Mr. Sarkisov's testimony, prosecutors offered ballistics evidence, bullets recovered from an apartment wall, photographs, recorded telephone conversations, a shotgun and the tennis bag used to store it.
As American investigators sought to corroborate the claims of a 23-year-old Nigerian man that Qaeda leaders in Yemen had trained and equipped him to blow up a Detroit-bound Northwest Airlines jet on Christmas Day, the plot casts a spotlight on the Obama administration's complicated relationship with Yemen.
The director of a Swiss drug-testing laboratory has agreed to provide information to investigators seeking to corroborate accusations by two former teammates of Lance Armstrong that the seven-time Tour de France champion used performance-enhancing drugs and conspired to cover up a positive drug test from the Tour de Suisse in 2001.
