Roland and Mavis Ramberg thought they knew the neighbors down the road, Doug and Candice Ouellette, who were both 38 years old.
Their grandchildren and the Ouellette's 10-year-old son and 8-year-old twin girls were friends.
"They seemed like a nice couple," says Mavis.
Then on Wednesday night, the Rambergs realized that something was clearly wrong.
"All I saw was squad cars, upon squad cars and helicopter," says Roland
One of the Ouellette's little girls had called 911. Investigators say Doug strangled Candice to death in their home, then hanged himself in an outbuilding.
"I can't imagine anything worse than having your dad kill your mom and then kill himself," says Chisago County Chief Deputy Bob Shoemaker.
Court documents filed in Chisago County detail the couple's troubled marriage. In June, police were called to the Ouellette's home for an attempted suicide.