You didn't mention what state your from, but regardless, yes, you can be charged with a crime. Harboring a Fugitive (18 U.S.C. § 1071) is based not only on state law but also federal law.

Harboring a fugitive refers to the crime of knowingly hiding a person wanted from the authorities. Federal and state laws, which vary by state, govern the crime of harboring a fugitive.

The federal statute, 18 U.S.C. § 1071, requires proof of four elements:

(1) proof that a federal warrant had been issued for the fugitive's arrest,

(2) that the accused had knowledge that a warrant had been issued,

(3) that the accused actually harbored or concealed the fugitive, and

(4) that the accused intended to prevent the fugitive's discovery or arrest.

So let's take a look at what the state can and can not prove.

(1) proof that a federal warrant had been issued for the fugitive's arrest

The state can prove this beyond a reasonable doubt because they would have the warrant in writing.

(2) that the accused had knowledge that a warrant had been issued

You, not your wife in this element are the accused, and unless the state has come to you in person and made you aware of the warrant for your wife's arrest it would be hard for the state to prove that you knew that your wife had a warrant for her arrest. But be forewarned, once the police come to your residence to try to serve the arrest warrant on your wife you must comply if she is in the residence because it now puts you in violation of Harboring a fugitive 18 U.S.C. § 1071.


(3) that the accused actually harbored or concealed the fugitive, and

(4) that the accused intended to prevent the fugitive's discovery or arrest

Can the state prove beyond a reasonable doubt, that if after they ask if your wife is in the residence, and you say "no," and the state then entered your residence and found your wife - that would be enough proof beyond a reasonable doubt that you willingly knew that your wife was in the residence, so elements 3 and 4 would be proven.