Under Wyoming Statutes 20-5-301, Wyoming will have jurisdiction. Section 20-5-301 provides:
(a)? Except as otherwise provided in W.S. 20-5-304, a court of this state has jurisdiction to make an initial child custody determination only if:
(i)? This state is the home state of the child on the date of the commencement of the proceeding, or was the home state of the child within six (6) months before the commencement of the proceeding and the child is absent from this state but a parent or person acting as a parent continues to live in this state;
(ii)? A court of another state does not have jurisdiction under a provision of law from that state that is in substantial conformity with paragraph (i) of this subsection, or a court of the home state of the child has declined to exercise jurisdiction on the ground that this state is the more appropriate forum under a provision of law from that state that is in substantial conformity with W.S. 20-5-307 or 20-5-308, and:
(A)? The child and the child's parents, or the child and at least one (1) parent or a person acting as a parent, have a significant connection with this state other than mere physical presence; and
(B)? Substantial evidence is available in this state concerning the child's care, protection, training and personal relationships.
(iii)? All courts of another state having jurisdiction under provisions of law from that state in substantial conformity with paragraph (i) or (ii) of this subsection have declined to exercise jurisdiction on the ground that a court of this state is the more appropriate forum to determine the custody of the child under a provision of law from that state that is in substantial conformity with W.S. 20-5-307 or 20-5-308; or
(iv)? No court of any other state would have jurisdiction under the criteria specified in paragraph (i), (ii) or (iii) of this subsection.
(b)? Subsection (a) of this section shall be the exclusive jurisdictional basis for making a child custody determination by a court of this state.
(c)? Physical presence of, or personal jurisdiction over, a party or a child shall not be necessary or sufficient to make a child custody determination.
The statutory construction of this section can get a little confusing, but the "or" at the end of (iii) indicates that if any one of the subsections are satisfied, Wyoming will have jurisdiction. Since the conditions of (i) are met (your child lived in Wyoming within 6 months of filing and one of his parents still lives in Wyoming), Wyoming will have initial jurisdiction in this case. However, Wyoming can decline jurisdiction, at its discretion, since your son now lives in Minnesota. This will be at the court's discretion and will have to be sorted out through the courts. I think you mentioned that the court in Minnesota was involved, is the court there seeking jurisdiction? It can assume jurisdiction if Wyoming agrees to decline jurisdiction of the matter. However, Wyoming will not be obligated to decline jurisdiction.
Are you working with anyone from the Minnesota court system? If so, you may want to contact them for more information. I am not sure what steps, if any, they have taken in this matter. Please let me know if you have any other questions. If this answers your question, please click "accept" so I may receive credit for my answer.
Best wishes and good luck,