A an accused defendant out on bond is correct to be concerned about the appearance of having a a wanted person in your home. However, you may not be required to call law enforcement, a simple threat to do so may cause her to leave. If not, I think it more likely than not that the police would be more interested in locating a wanted fugitive than violating the person who turned her in. You should talk to your attorney for advice. Good luck.
I have been licensed to practice in the State of Oregon since 1990. I am not offering legal advice regarding your question, only general information regarding the law. You are not my client nor am I your attorney unless we sign a retainer agreement.
Since you do not have a specific rental agreement with the acquaintance, you can not evict her. Eviction can be had only when there is a verbal or written lease. You can have her removed by way of an action called "Unlawful Detainer"--she came in as a guest, now won't leave.
I do not do criminal law, but in a way you ARE harboring: by not calling law enforcement you are enabling her to stay there.
You may also want to consider getting out of there yourself. I can see her claiming domestic violence.
I recommend that you consult with a criminal defense attorney to learn what you should or should not be doing with regard the harboring issue.
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You can bring a civil action for either unlawful detainer or ejectment. Asserting your rights through a civil action should not create a problem for you. You should consult an experienced lawyer in your area.
Disclaimer: This answer is provided for informational purposes only, does not constitute legal advice, and does not create an attorney-client relationship. Actual legal advice can only be provided after completing a comprehensive consultation in which all of the relevant facts are discussed and reviewed.