This is of course a rough estimation, but it's still quite telling.
A medical dose of turinabol for males is 5-10mg daily. Let's assume for simplicity that he ingested a single 5mg dose.
Jones tested positive for 60 picograms which equals 0.00000006 mg
The half life of turinabol is 16 hours and it takes ~420 hours or 17.5 days for the 5mg dose to reach 60 picograms.
In other words, the spin that is such an unthinkably infinitesimal amount is misleading given that it can reach such levels in a relatively short period of time after a significant dose.
I used an internet half life calculator for this and plugged in the variables, so please check my work, but given my belt level on Sherdog I'm highly unlikely to be incorrect about such matters.