In the aftermath of Mangione’s arrest, news organizations have searched for clues about Mangione’s background and his potential motive, including in comments from family and friends. According to several statements posted to social media and shared with the press, a vague portrait has begun to emerge of a young man who complained of chronic back pain and may have undergone spinal surgery before he appears to have stopped communicating with people — including family members — months ahead of the Dec. 4 shooting. The San Francisco Standard reported Mangione's mom reported him missing to San Francisco police on Nov. 18 (this was also confirmed by the New York Times).

The third doctor performed a Nerve Conduction Study, Electromyography, MRI, and blood tests. Each test cost $800 to $1200. She hit the $6000 deductible of her UnitedHealthcare plan in October. Then the doctor went on vacation, and my mother wasn’t able to resume tests until January when her deductible reset.

[...]

The high copays made consistent treatment impossible. New treatments were denied as “not medically necessary.” Old treatments didn’t work, and still put us out for thousands of dollars.

UnitedHealthcare limited specialist consultations to twice a year.

Then they refused to cover advanced imaging, which the specialists required for an appointment.

Prior authorizations took weeks, then months.

UnitedHealthcare constantly changed their claim filing procedure. They said my mother’s doctor needed to fax his notes. Then UnitedHealthcare said they did not save faxed patient correspondence, and required a hardcopy of the doctor’s typed notes to be mailed. Then they said they never received the notes. They were unable to approve the claim until they had received and filed the notes.

They promised coverage, and broke their word to my mother.

With every delay, my anger surged. With every denial, I wanted to throw the doctor through the glass wall of their hospital waiting room.

But it wasn’t them. It wasn’t the doctors, the receptionists, administrators, pharmacists, imaging technicians, or anyone we ever met. It was UnitedHealthcare.