The insurance company will try to discredit all parties involved in a case against them. This includes discrediting expert witnesses and eyewitnesses.
In addition to questioning an expert’s qualifications, some actions the insurance company may take to discredit a witness include:
Revealing a criminal background
Attacking the person’s reputation
Questioning the person’s sobriety
Digging through medical records to reveal a memory condition
The insurance company may also argue that a passenger in your vehicle is not a credible witness, even if his or her testimony is valuable to the case. They will argue that the passenger may be biased because he or she knows you.