Another states:

This developmental program is designed to provide [redacted] in support of TOG [presumably the agency’s Technical Operations Group] investigations and operations. This surveillance solution can be deployed during [multiple redactions] to support ongoing tactical operations.

This does not appear to be a current program.

These heavily redacted documents reveal almost no information about the nature of the Marshals’ drone program. However, the Marshals Service explained to the Los Angeles Times that they tested two small drones in 2004 and 2005. The experimental program ended after both drones crashed.

We need limits on the use of drones. A bi-partisan bill was recently introduced to do just that. The ACLU says:

The proposed legislation, which is supported by the ACLU, would enact judicial and Congressional oversight mechanisms, require government agencies to register all drones and get a warrant when using them for surveillance (except in emergency situations), and prohibit the domestic use of armed drones.