Kirsten Marina Costas was born on July 23, 1968, and was only fifteen when the horrific event occurred.
Some blame Kirsten Costas for her own death, while others understand that murder is never a viable solution to life’s problems.
In the era when bullying and mental degradation of classmates were seen not as a potential life-altering problem but as a passing feature of high school fun, it’s hard to know what’s okay and what’s not okay.
Ranked as the second friendliest city, Orinda was home to academic excellence and high graduation rates.
It is home to some of the most prosperous professionals in all of Contra Costa County and the educators within its facility.
In general, Orinda has little lag or lack of academic prowess, as is Miramonte High School, known for its alma mater, which ranges from NFL players to business executives.
Kirsten Costa was no different and was eager to run the race to success as a high school sophomore in 1984.
She was a straight-A swimmer and cheerleader, best known for being a member of the Bob-O-Links, whose members called themselves the Bobbies.
Kirsten was rich with short dark locks and was a favorite in school. Although many claims she has a bad streak of being sarcastic and condescending, her friends portray her as witty and confident.
On the other side of the flashes of adolescence was Bernadette Protti, Kirsten Costas killer, a young woman from a mediocre Catholic family with a retired father with six little mouths to feed and a stay-at-home mother.
All she dreamed of every minute was to lead a life like her pretty classmate.
She couldn’t afford the clothes, accessories, or lifestyle that the Costas flaunted, and she had decided that she could never be as beautiful as the sole Costa heiress.
With an unquenchable desire to succeed and be loved as much as the cheerleader was, she didn’t settle for her friends.
Then, she began blowing herself up and imitating Kirsten Costa with every waking breath.
Budding friendship went wrong. Kirsten Costas killer applied for the cheerleading position, and the committee was created to organize the yearbook, but something else worked.
Her stress started to get to her until she ended up working with Kirsten in the student office.
According to some sources, the cheerleader who observed Bernadette’s obsession with her began to take advantage of her.
She forced her to do her dirty work so that she and her friends could point the finger at the weird girl when she was caught. She also became a Bobbies, a local sorority, along with the cheerleader.
But none of her efforts proved effective enough against Kirsten, who ignored Bernadette’s existence and often insulted her poverty and impoverished lifestyle.
It was mid-June 1984, and the brutal summer was upon her, but Bernadette Protti’s fixation held firm.
She strategized to spend some alone time with the popular cheerleader and called Costa House under the guise of a celebration for the newest Bobbies the following Saturday.
She informed Berit Costas, Kirsten’s mother, offered to pick up her daughter at 8:30 p.m. on the scheduled date.
She swore to her parents that she was not babysitting. When the day came, Kirsten got into Bernadette’s Pinto.
She was disappointed to see that it was her, but she complied even though she found something suspicious seeing her classmate in casual clothes.
When they got to Moraga, she asked her to smoke weed, and, according to the defendant, this is where the conflict began, with Bernadette refusing the cheerleader’s offer to smoke.»Investigation into the horrific bullying experience of Kirsten Marina Costas«