Feds had fish shop in U.P. during undercover probe

L'ANSE, MI - Agents working undercover ran a fish business in Michigan's Upper Peninsula while investigating illegal catches of lake trout.

The disclosure is in a document unsealed in Marquette federal court.

Since 2012, the U.S. Fish and Wildlife Service says it's been investigating illegal catches of lake trout in the upper Great Lakes. The population has been affected by sea lampreys and excessive fishing.