What do we actually know about Christine Armstrong, the sister of Kaitlin Armstrong?

Sisters Kaitlin and Christine Armstrong grew up in Livonia, Michigan. A few reports at the time of the murder detailed more about Christine Armstrong. She was 31 at the time, three years younger than Kaitlin. Christine is also known as Christie, and her social media profiles describe her as a former banker and marketing consultant.

According to Fox News in 2022, Christie Armstrong moved to New York, where the Camp Haven, a “sustainable retreat” about two hours from New York City, had listed her as a member of its communications team on its website. A man there told the publication that Kaitlin Armstrong would visit her sister.

The witness said Kaitlin had visited “right before the whole thing blew up” referencing the murder, and claimed Christine had cooperated with US marshals who they said had visited when the manhunt for Kaitlin was underway.
The passports of Kaitlin Armstrong and her sister

via Netflix

When Kaitlin Armstrong was arrested, two passports were found. One of the documents had her name, and the other seemingly belonged to her lookalike sister, Christine Elizabeth Armstrong. Christine is brunette, so Kaitlin had dyed her hair to look more like her younger sister.

The main question a lot of people have following the Netflix doc is if Kaitlin Armstrong spoke to her sister about what she was going to do when she took her passport. Still to this day, it is unclear if Christine was aware that her passport had been taken by her sister, and she has never faced any criminal charges.