Overview
- Haverhill police arrested 18-year-old Isabella Sargent and charged her with arson of a structure and conspiracy to commit arson.
- Investigators say the blaze was intentional and are still examining whether others were involved.
- Fire crews arrived to heavy flames on all four floors of the vacant mill at 14 Stevens St., with mutual aid from Georgetown, Groveland, Lawrence and Methuen.
- Her arraignment is scheduled in Haverhill District Court as officials continue to process the scene.
- No injuries were reported, but the building suffered significant structural damage and smoldered for hours, and a 2015 fire at another section prompted a response plan used in this incident at the 1884 heavy-timber complex.