Because we don't know what exposed about him is true or lie.
Bo XiLai beheaded Wen Qiang, but who knows it is fair or not.
Question for us to think:
if a bad guy accused another person a bad guy,
this person is a real bad guy or victim????
Suppose Bo XiLai is a bad guy,
He accused Wen Qiang a bad guy,
the question is WEN QIANG is a real bad guy or a victim???