Police showed up at the family's home on Monday at about 11:30 a.m. after receiving a report that Emmit M. Ritter-Simpson, 17, of Augusta, Wis., was being disorderly and threatened a family member, the Eau Claire (Wis.) Leader-Telegram reported.
Ritter-Simpson's foster father told police his wife called him home because the teen was disorderly.
When the foster father, whose name was not reported, arrived home, Ritter-Simpson was sharpening a wooden dowel with a utility knife. The teenager then allegedly attacked his foster father with the knife and the dowel, but the older man managed to tackle him.
Ritter-Simpson then went into the basement. When his foster father went to check on him a few minutes later, Ritter-Simpson pointed a compound bow at him.
Police evacuated the family from the home and tried to get Ritter-Simpson to come out of the basement.
Ritter-Simpson was later taken into custody without incident.
Police said they discovered booby traps in the basement after the teen was arrested. Ritter-Simpson had placed lubricant on door knobs and at the top of the basement steps, light bulbs on the bottom step and a barricade at the bottom of the steps, police said.
He was charged with two felony counts of first-degree recklessly endangering safety, two misdemeanor counts of disorderly conduct and misdemeanor charges of negligent handling of a weapon, criminal damage to property and obstructing an officer.