A Fond du Lac man is expected to make his initial court appearance Tuesday in connection with a series of home invasions. Lucas Leffel faces charges of burglary and attempted second degree sexual assault. Police Chief Bill Lamb says Leffel has admitted to entering four homes in the southeast side of town while naked. “These are frightening cases regardless of motive when they’re entering homes,” Lamb told WFDL news. “There are two types of burglaries, when a burglar is targeting a house or business that they believe to be empty. That’s one thing, but when they are going into a home in the middle of the night realizing there probably are people in there…that’s an entirely different set of circumstances.” Lamb says he won’t say what investigators believe Leffel’s motive was until the criminal complaint is filed.