Question: Who was the sheriff of a ghost town in Beaverhead County, Montana?

Context paragraphs:
Sheriff Mountain: Sheriff Mountain is a summit in Beaverhead County, Montana, in the United States.  With an elevation of 9787 ft , Sheriff Mountain is the 284th highest summit in the state of Montana.

Hecla, Montana: Hecla was a town in Beaverhead County, Montana.  It has been designated as a ghost town with only a few ruined buildings remaining.  It was notable at one time as the home of Blanche Lamont, who taught at Hecla's one-room schoolhouse.  Lamont would become the first of two murder victims of Theodore Durrant.  Margaret Brown also lived there for a time.

Armstead, Montana: Armstead is a former community in Beaverhead County, Montana, United States, about 21 mi south of the county seat of Dillon.  It was named after miner Harry Armstead.  Armstead was located in a narrow valley of the Beaverhead River, near the mouth of Horse Prairie Creek.  The town was a station stop on the Union Pacific Railroad line from Idaho Falls, Idaho to Butte, Montana.  There was a post office in Armstead from 1907 to 1962.

Beaverslide: A beaverslide is a device for stacking hay made of wooden poles and planks that builds haystacks of loose, unbaled hay stored outdoors to be used as fodder for livestock.  The beaverslide consists of a frame supporting an inclined plane up which a load of hay is pushed to a height of about 30 ft , before dropping through a large gap.  The resulting loaf-shaped haystacks can be up to 30 feet high, can weigh up to 20 tons, and can theoretically last up to five or six years.  It was invented in the early 1900s and was first called the Beaverhead County Slide Stacker after its place of origin, the Big Hole Valley in Beaverhead County, Montana.  The name was quickly shortened to "beaverslide."

Beaverhead County High School: Beaverhead County High School is a high school in the small town of Dillon, Beaverhead County, Montana.

Ghost Town, Oakland, California: Ghost Town (sometimes spelled Ghosttown) is the informal name of the Foster Hoover Historic District neighborhood in West Oakland, Oakland, California.  The community is known for its violence and blight .  Some people believe the name originates from a drug king pin who referred to the area as a ghost town due to the shortage of other drug dealers whose absence was attributed to the king pin's dominance over the area.  Others believe it derives from the two former casket companies located side by side on Filbert Street between 30th and 32nd Streets, while others claim that the presence of ghostly white people in an historically black neighborhood gave it its name.  Ghost Town stretches from 27th Street to 35th Street in the area immediately southwest of the MacArthur Maze.  Others see the neighborhood bounded by Adeline on the West and San Pablo on the East.  Ghost Town Farms, one of the more successful expressions of urban agriculture activity in Oakland is located in the heart of the district at 2727 Martin Luther King Jr.  Way, between 27th and 28th Streets.  The area is also one of Oakland's many open-air art galleries, with exceptional muralist work continually on exhibition, particularly along Martin Luther King Jr.  Way.  This neighborhood has an active citizen crime patrol, including one group of seniors who walk the neighborhood weekly to get physical exercise and report blight.  Jerry Brown, governor of California and former Mayor of Oakland stated: "Instead of an omnibus crime bill, you have to deal with shootings in Ghost Town in West Oakland and sideshows in East Oakland."  Brown made attempts to turn around the blighted West Oakland neighborhood after "60 Minutes" featured it in a television profile.  Housing prices have increased.  So has drug dealing, especially since nearby parks were closed by the City of Oakland.  Prostitution, in 2015, has been on the decline for at least a decade.

Bannack, Montana: Bannack is a ghost town in Beaverhead County, Montana, United States, located on Grasshopper Creek, approximately 11 mi upstream from where Grasshopper Creek joins with the Beaverhead River south of Dillon.  Founded in 1862, the town contemporarily operates as a National Historic Landmark and is managed by the state of Montana as Bannack State Park.

Beaverhead Mountains: The Beaverhead Mountains, highest point Scott Peak, el.  11393 ft , are a mountain range straddling the Continental Divide in the U.S. states of Montana and Idaho.  (See also the GNIS link here.)  They are a sub-range of the Bitterroot Range, and divide Beaverhead County, Montana from Lemhi County, Idaho and Clark County, Idaho.

Red Rock Pass (Beaverhead County, Montana): Red Rock Pass, el.  7152 ft is a mountain pass in Beaverhead County, Montana.  The pass lies on the Continental Divide just north of the eastern Centennial Mountains.  It separates Beaverhead County, Montana (west) from Fremont County, Idaho (east).  The pass is traversed by an unimproved gravel road.

Innocents (gang): The Innocents were an alleged gang of outlaw road agents in Montana Territory who operated during the gold rush of the 1860s, preying on shipments and travelers carrying gold from Virginia City, Montana.  According to the early chronicler Thomas Dimsdale, the gang attempted to steal gold while it was being transported; they killed many travelers who resisted.  Sheriff Henry Plummer of Bannack, Montana was accused of leading the group, and was executed by a group of vigilantes from Virginia City in January 1864, along with several other alleged gang members.

Supporting paragraphs: Innocents (gang) Bannack, Montana
Answer: Henry Plummer