The man authorities believe committed the deadly shooting at Brown University was found dead inside a Salem, New Hampshire, storage unit, authorities said Thursday night.

Claudio Manuel Neves Valente, a 48-year-old former Brown graduate student and Portuguese national, was also believed to have killed a renowned physics professor this week near Boston.

Providence Police Chief Col. Oscar Perez said the suspect, whose last known address was in Miami, died from a self-inflicted gunshot wound and acted alone, “as far as we know.”