the word divorce being thrown around. from the beginning they had one suspect, it was chris. there was another purse here that could ve done this, and it was german. that would be a motive for murder. that was a concern. you see it on tv happening to other people, but you don t think it will happen to you. two shots were fired. and then 1001 questions. you just don t think that things will happen in a small town to good people. and it did. reporter: it was, this was where happiness lived. happiness, memories, and desire. wishes and dreams just out of reach. its name is spider lake, one of those thousands of lakes that filled up the rocky gouges and glaciers left behind. maybe that s why they sparkle the way they do. why this one in minnesota spread out every which way. and here, near the tip of its northern is the spider lake resort. family cabins. it calls itself one of northern minnesota s best kept secrets. secrets. the word that will certainly apply
no not at that time. he didn t see anybody. he didn t hear anything, but that one shot. and then just noticed the back door being wide open. reporter: but the idea that a stranger had walked in, killed gianna, and walked out again didn t make sense. in fact that morning after, nothing about the murder of a beloved local in a tiny hamlet in the middle of america made any sense at all. coming up questions for the other person in the house that night. reporter: a story begins to emerge, teenage tensions and troubles.