Here's something somebody should research: the verified rate of recidivism among male sprinter dopers.
There are obvious ones that I can think of, like Johnson and Mullings with PED's, Montgomery with narcotics, etc.
It would not surprise me if the majority were recidivists.
'Therefore, Gatlin should be allowed to compete'
We might think the rest are doping. We know he was
Under the current rules he should be allowed to compete
The current rules are not nearly hard enough to put would be dopers off.