The Brief Kennewick police are searching for 41-year-old Matthew Susmilch, who is wanted for kidnapping, assault, and making threats. Susmilch’s 4-year-old daughter, who was the subject of a Saturday night Amber Alert, has been found safe. Kennewick Police are searching for a 41-year-old man wanted for kidnapping following an Amber Alert issued over the weekend. (Washington State Patrol)WA Amber Alert: Police search for Matthew SusmilchMatthew Susmilch is wanted for kidnapping, assault and making threats, according to police. Susmilch is the father of the four-year-old girl who was the subject of a Saturday night Amber Alert.