Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: On the day an investigation started into the former IAAF president Lamine Diack, the World Anti-Doping Association announced it would be publishing its independent report into allegations of widespread doping in sport on Monday. French police earlier confirmed Diack is being investigated over an alleged payment of more than one million euros to cover up doping offences by Russian athletes - one of the issues WADA's independent report has been looking into. A prosecutor from the Parquet National Financier (PNF) - the office that handles financial prosecutions in France - confirmed that Diack is being investigated. Diack and his adviser Habib Cisse have been formally interviewed, sources with knowledge of the investigation have confirmed. The IAAF's anti-doping director Gabriel Dolle has been taken into custody.The World Anti-Doping Association will publish its report on MondayWADA is looking into allegations of widespread doping in sportREAD: Athletics in turmoil with Lamine Diack under investigationCOMMENT: Sebastian Coe was too quick to back his friends 
 Question:Several IAAF officials are implicated in covering up Russian doping including Diack's son, IAAF marketing consultant _.

Diack