If I were you I would use the tool I've attached below. Search for: New York Real estate and you will have a list of attorneys to choose from. Look at their websites and make an informed decision based upon the information you read on each attorney. Good luck
You need to first distinguish whether your husband was at work when this accident happend (worker's compensation insurance claim), or if he was lawfully on the premises of somebody else's business.
If he was at work, his employer was supposed to have worker's compensation insurance and can be in big trouble for letting it lapse. Employer's are strictly liable under the worker's compensation laws.
If this was not an employmen related injury, then your husband can sue the business, but those types of cases are hard to win unless you can prove the business owner had notice of the leak and reasonable time to make the premises safe. The lawyer may not be interested in the case if he feels he cannot prove the business had notice of the dangerous condition. See if any of the witnesses can attest that they have seen that ice machine leak before, and then go see another lawyer!