First, assuming that your husband has a court-appointed criminal attorney they generally do not get involved in the forfeiture proceedings as they are a civil matter and a seperate case. Therefore, it was up to your husband to retain an attorney to pursue his interests/rights in the forfeiture proceeding. Secondly, since the forfeiture proceeding is a seperate legal action the outcome of the criminal case will have no bearing on what will, or has happened to the property seized in the forfeiture actions. Thirdly, since from the fact scenario you present it sounds like the time to file on the forfeiture proceeding has expired that case is probably over at this point with the items having been forfeited. You could try to look into retaining an attorney to petition the court to reopen the forfeiture proceeding.
Though it impossible to know for sure without seeing the legal papers involved, most asset forfeitures in Minnesota are the kind referred to as administrative forfeitures, authorized by statute. If this is one of of those, and the time to serve and file a challenge to the seizure and administrative forfeiture notice has expired, generally there is nothing that can be done to get the property back. You might wish to consult your lawyer about it.
This is an area getting much attention lately by the public, news media, and politicians as an area in need of legal reform, by changing the statutes.
It is important to challenge an administrative forfeiture notice well before short deadline has expired. Many commentators have remarked that the current statutes on forfeiture in Minnesota amount to little more than legalized theft. Law enforcement agencies get to keep much of the proceeds, which creates a conflict of interest for them.