Conversation so far:
What was the BALCO Scandal?
BALCO marketed tetrahydrogestrinone ("the Clear"), a performance-enhancing anabolic steroid that was undetectable by doping tests.
What happened with this?
He was under investigation by a federal grand jury regarding his testimony in the BALCO case.
What happened with the investigation?
and was indicted on perjury and obstruction of justice charges on November 15, 2007.
What were the charges?
The indictment alleges that Bonds lied while under oath about his alleged use of steroids.
Did he get in trouble?
all four defendants in the BALCO steroid scandal trial, including Anderson, struck deals with federal prosecutors.
What was the outcome?
Later reports on Bonds's leaked grand-jury testimony contend that he admitted to unknowingly using "the cream" and "the clear".
How did that affect his image?
CANNOTANSWER.
Any more information about the scandal?
During grand jury testimony on December 4, 2003, Bonds said that he used a clear substance and a cream that he received from his personal strength trainer.

Question: Who was the trainer?
Self-contained rewrite: Who was the trainer that testified in the BALCO scandal trial?