Age, Biography and Wiki

Kirsten Costas (Kirsten Marina Costas) was born on 23 July, 1968 in Oakland, California, U.S., is a 1984 murder in Orinda, California, United States. Discover Kirsten Costas's Biography, Age, Height, Physical Stats, Dating/Affairs, Family and career updates. Learn How rich is she in this year and how she spends money? Also learn how she earned most of networth at the age of 15 years old?

Popular As Kirsten Marina Costas
Occupation N/A
Age 15 years old
Zodiac Sign Cancer
Born 23 July, 1968
Birthday 23 July
Birthplace Oakland, California, U.S.
Date of death 23 June, 1984
Died Place Orinda, California, U.S.
Nationality United States

We recommend you to check the complete list of Famous People born on 23 July. She is a member of famous with the age 15 years old group.

Kirsten Costas Height, Weight & Measurements

At 15 years old, Kirsten Costas height not available right now. We will update Kirsten Costas's Height, weight, Body Measurements, Eye Color, Hair Color, Shoe & Dress size soon as possible.

Physical Status
Height Not Available
Weight Not Available
Body Measurements Not Available
Eye Color Not Available
Hair Color Not Available

Dating & Relationship status

She is currently single. She is not dating anyone. We don't have much information about She's past relationship and any previous engaged. According to our Database, She has no children.

Family
Parents Arthur Costas (father)Berit Costas (mother)
Husband Not Available
Sibling Not Available
Children Not Available

Kirsten Costas Net Worth

Her net worth has been growing significantly in 2023-2024. So, how much is Kirsten Costas worth at the age of 15 years old? Kirsten Costas’s income source is mostly from being a successful . She is from United States. We have estimated Kirsten Costas's net worth, money, salary, income, and assets.

Net Worth in 2024 $1 Million - $5 Million
Salary in 2024 Under Review
Net Worth in 2023 Pending
Salary in 2023 Under Review
House Not Available
Cars Not Available
Source of Income

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Timeline

1968

Kirsten Marina Costas (July 23, 1968 – June 23, 1984) was an American high school student who was murdered by her classmate Bernadette Protti in June 1984.

The daughter of affluent parents Arthur and Berit Costas, Kirsten Costas and her brother Peter grew up in the small suburban town of Orinda, California.

Costas attended Miramonte High School and was a member of the school's varsity swim team and the cheerleading squad.

1980

Costas' murder was featured in season 5 of Deadly Women, season 1, episode 3, of Investigation Discovery's The 1980's: The Deadliest Decade, and an episode of Killer Kids titled Rumors & The To-Do List.

1984

On June 23, 1984, Costas was lured with a phony invitation to a dinner for the Bob-o-Links, a sorority-like group at school.

According to Protti's later testimony, she had planned to take Costas to the party to befriend her, but Costas became angry when she was told that there was no dinner for the new "Bobbies."

The girls quarreled and Costas fled to the home of Alex and Mary Jane Arnold, telling them that her friend had gone "weird."

When Costas could not reach her parents by telephone, Alex Arnold drove her home, noticing that the Protti family's Pinto was following them.

At the Costas home, Arnold, sitting in his car, saw Protti attack Costas.

He thought that he was witnessing a fistfight, but in fact Protti had stabbed Costas five times with a chef knife and fled.

The Costases' neighbors called an ambulance, but Kirsten was mortally wounded and died at a nearby hospital.

It took the police almost six months to find Costas' killer.

Protti passed a lie-detector test, but her alibi went unverified.

After attempting to confirm Protti's alibi, police suspected that she had lied.

Following a conversation with an FBI agent who informed her that her arrest was imminent and that they knew that she had killed Kirsten, Protti wrote her mother a letter in which she made a full confession.

Protti claimed to have found the kitchen knife by chance, and her elder sister, Virginia Varela, testified in court that she kept that knife in her car to cut vegetables.

The Costases did not believe Protti's story; they asserted that nobody would use a chef knife to slice tomatoes in a car and that Protti, casually dressed that evening, never intended to take Kirsten to a party but had planned to murder her.

1986

The Costas family left Orinda and moved to Hawaii in 1986.

1987

American filmmaker James Benning covered the aftermath of the murder in his 1987 documentary Landscape Suicide.

1992

Protti was sentenced to a maximum of nine years, but was released seven years later in 1992 on parole at the age of 23.

Costas' parents vehemently opposed Protti's release.

1994

In 1994, the story was made into a television movie entitled A Friend to Die For (also known as Death of a Cheerleader), with Tori Spelling as Stacy Lockwood, a character based on Kirsten Costas and Kellie Martin as Angela Delvecchio, a character based on Bernadette Protti.

2019

The aforementioned film was remade in 2019 as a Lifetime television movie starring Aubrey Peeples as Bridget Moretti and Sarah Dugdale as Kelli Locke, characters based on Protti and Costas, and Kellie Martin, who played Protti in the first television movie, playing the FBI Agent charged to tracking her.