Question

Sylvester is hired by the defense to help select the jurors who would be less likely to convict

Answer 1

Sylvester's situation is an example of the Advisor role in the legal system.
An advisor's main duty is to guide the defendant in making their legal decision so they could receive the least punishment possible.
Advisors usually will read the evidence and jury's favor in order to decide whether to receive guilty verdict or pursue non-guilty verdict.