Walter is WBUR's state politics reporter, covering the State House with a focus on accountability and enterprise reporting. He previously covered Boston City Hall and breaking news. His story on ousted Massachusetts police officers moving from one department to the next won the Public Media Journalists Association award for investigative reporting and was a finalist for the Alfred I. duPont–Columbia University Award.
Walter graduated from Bowdoin College and then worked at the Forecaster, a weekly newspaper in Portland, Maine. He spent a year working for an English-language newspaper in Sri Lanka on a fellowship, reporting on politics, development and post-war reconstruction in the island’s capital. He joined WBUR in 2018 as a producer for Radio Boston and newscast.