America’s secret police have worked this angle for more than a year. Either charge Manafort or admit openly that nothing has been found. Either that or admit that there is an ongoing investigation similar to the Mafia and we will have an answer in twenty five years.
It is a mafia investigation. alleged High level crime lord was wiretapped as was manafort. Alleged crime lord trying to stay alive by announcing to Semion he isnt cooperating with anyone.
The trick bere is to turn info gleaned from counterintelligence surveillance into “regular” admissible evidence. They are going to hit manafort hard in the indictment to get him to flip.
Renato mariotti who used to work in office taking down alleged crime lord lays out the intricacies of this investigation on a daily basis.