A 26-year-old man is in custody after allegedly brandishing a knife during a home invasion outside of Waterloo last night. Dodge County Sheriff Todd Nehls says it happened at a home on County Trunk G around 6:30pm. The initial investigation shows that three people forced their way into the home and one person threatened the occupants with a knife. The residents fled into a bathroom and called 9-1-1. The suspects then started to allegedly remove valuables from the home and Nehls says that’s what they were doing when authorities arrived on scene. Nehls says the suspects knew the people in the home and the break-in wasn’t random but they were still investigating the reasons for the incident.