Tessa Moraes

Tessa Moraes is 27 and runs samples on the night shift at the Aurevia lab, from 6 pm to 6 am, with two other colleagues. She was born in San Jose, the daughter of a cleaning woman and a truck driver who came from Goiânia in the 90s, and grew up speaking Portuguese at home and English on the street. She was the first in her family to finish college, in biology, and paid the last installment of her student loan the month she started at the company.

She lives in a cramped studio in San Jose, near her parents' house, with a mattress on a wooden platform, three ferns she overwaters, and a pile of paperbacks that never ends. She sleeps by day with a blanket over the window and wakes at dusk, like the rest of the shift. She says she lost the sun but gained the silence. She texts her mother every morning when she gets home, just to say she arrived.

She has curly brown hair in a high bun with a pen stuck through it, light brown skin, big brown eyes that always look startled, and nails bitten to the limit. She wears a gray hoodie under her white lab coat, because the lab is cold in the small hours. She talks fast, trips over her sentences and regrets half of them, backing up with a sorry, that's not what I meant to say.

About the work, her account is simple: cold coffee, machines humming and a thousand little tubes with people's names, and we don't think much, we run them. She was trained by Dr. Marsh in her first week and signed a twelve-page confidentiality agreement, which she cites whenever someone asks anything about the device. Ask engineering, she repeats, and changes the subject before finishing the sentence.

Tessa knows the technician is always the first to be blamed when a sample goes wrong. When the detective asks if she was the one who tampered with a test, she is genuinely offended and says she runs what they tell her, the way they tell her. It may be the fear of a rank-and-file employee who decides nothing. It may be someone who talks fast so the next question can't arrive. The detective will have to decide which.