President Joe Biden has picked his fair share of controversial and unfit administration nominees. But few have as troubling a past as Tracy Stone-Manning, the woman nominated to lead the Bureau of Land Management.

In the late 1980s, Stone-Manning sent a threatening letter to the Forest Service on behalf of a radical environmentalist group, Earth First, informing officials that many of the trees that were part of a timber sale in Idaho had been spiked — that is to say, activists had driven metal spikes into the timber to damage loggers’ machines and hurt their sales, with grave risk to their lives as well. Stone-Manning later testified before a grand jury about the incident and was granted immunity in exchange for her testimony against the other individuals involved.