MONROE - The defense for a former Monroe resident charged with sexually assaulting an unconscious woman will not be allowed to call an expert witness to testify at trial. Derek J. Larosh, 28, Rock Springs, appeared in Green County Circuit Court Monday for a hearing on the relevance of the testimony of a Milwaukee toxicologist. Larosh's charges - two counts of second-degree sexual assault and four counts of bail jumping - arose after he allegedly invited an intoxicated woman into his home in August 2014.