If the DOJ prosecutes someone on a process crime (lying during an interview with the FBI/DOJ), they do it because they have nothing else.
If the DOJ doesn't prosecute someone on process crimes, that means they have an airtight case ready to to prosecute the individual with.
The only reason McCabe didn't get charged for a process crime is because they have airtight cases that will jail him for decades.
The only reason Stone got charged for a process crime is because they didn't have anything else to charge him with.
Learn how the DOJ works folks. Justice is coming.