Authorities have identified the missing swimmer in Lake Michigan. The search has been called off for 19-year old Kristopher Kane of Milwaukee. The Coast Guard says he is presumed to be drowned. Kane was swimming with friends off the Sheboygan shore when an undertow took him further out into the lake near the Edgewater Power Plant. Witnesses said he was swimming up to 100 feet off shore and was pulled farther out in the lake before disappearing.