COBB COUNTY, Ga. - Investigators now believe two teenaged girls were doing drugs shortly before one stabbed the other.
Abbey Hebert, 17, died in the attack in her front yard.
Channel 2's Cobb County bureau chief Ross Cavitt went to the victim's high school Monday.
Many students wore black at Allatoona High to remember Hebert, counselors helped students, teachers delayed exams.
Everyone was not just shocked at the 17-year-old's death, but by how it happened and who allegedly did it.
, 18, Hebert's cousin, is jailed without bond and charged with murder.
"I think it was like two days before they tweeted each other telling them how much they loved each other and things like that so its just mind blowing to me," one student said.
Smith spent the night at Hebert
's Acworth home, and it was early Saturday morning when the two fought in the kitchen , with Smith stabbing Hebert and chasing her outside, police said.
Court records obtained by Channel 2 show
Smith later told police the pair had smoked "suspected" marijuana a short time earlier.
A neighbor then saw
Smith chasing Hebert outside the home with a knife and stabbing her numerous times.
admitted to investigators about stabbing Hebert while under the influence of whatever they had smoked, according to the documents.
Hebert 's friends placed red and black ribbons across her neighborhood, hundreds of students gathered for a memorial over the weekend and placed memories at the football field.
Smith graduated from a high school in Cherokee County, her neighborhood very similar to her friend's in Acworth.
Police tell Cavitt they've applied for search warrants to take blood from the suspect and search cars and homes to pin down what drugs, if any the teens had been using.