Oh, well, sure, Nurse. I would think a private investigator would typically be involved with cheating spouses, business partners who are suspected of being shady, and then there's her credible past of working as an insurance claim investigator as well as a PI.
I realize this is different from a homicide investigator, but I think someone trained with her experience is dedicated to getting to the truth, and knows how to do it. Rather than, say, quickly deciding what happened and then following up to document that what they think happened, did indeed happen. I'm just going to say I'm prejudiced into believing that's what LE does. Typically they come up with a very quick analysis of who is guilty, and then the backfill to find evidence that they are right.
I will acknowledge that this usually pans out because they are usually (as in, most often, more than 50% of the time) right.
A bit of a different topic, but I have USAA insurance and I have been amazed at what information USAA private employees can turn up that LE can't seem to locate after a car wreck I would back their investigators against any COP, as far as being able to turn up information AND being willing to share it with me. Maybe not all insurance investigators are tip of the top like USAA, but I'm backing this breath of fresh air in the Jaymie Adams case.