In your 2014 story about Rita Jeptoo’s positive A sample before the NYC Marathon there is a section on Jeptoo's (and Sumgong's) former agent Federico Rosa who indicated he might've known where the drugs came from.
Do you have the ability to follow up with him? Can you ask him if he'll reveal his suspicious? it certainly would be incriminating if it was Noah Talam (Sumgong’s husband and coach)
For reference, from your article: http://www.letsrun.com/news/20...drug-test/
"Federico Rosa said he and Berardelli gave nothing to do with Jeptoo’s positive; he added he has an idea who may have been involved
He also indicated he had an idea who may have supplied Jeptoo with drugs if she did indeed use them"