Please note that the dates on the military headstone appear to be incorrect. The headstone indicates the death date as Oct 12. The following article and the Montana death index show the date as Nov 12. The headstone indicates the birth date as Aug 28, 1898. Idaho Birth Index shows Robert Henry Cockrell born at Cora, Latah County on Oct. 28, 1898: Columbus Jefferson Cockrell, father; Hettie Griner, mother.
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The following provided by Find A Grave contributor Lorena (#46917011):

Great Falls Tribune
Great Falls, MT
Monday, November 13, 1961
Page 1, Column 5

Shelby Man Victim of Accident
By Tribune Correspondent

SHELBY—Robert Henry Cockrell, 63, died Sunday afternoon from injuries suffered earlier in the day when he was struck by a car on Shelby’s Front Street.

Authorities said he was hit by a car driven by Mrs. Mary Pettigrew, who told investigating officers she didn’t see the man as he was crossing the street.

Cockrell suffered a skull fracture, and a fractured pelvis. The accident happened at 9:15 a.m. The victim died three hours later in the Toole County Hospital.

No inquest was held.

Cockrell was born Oct. 28, 1898 in Corey, Idaho. He came to Montana in 1910 and homesteaded north of Galata. Later he moved to Libby and then to Whitefish before moving to Shelby in 1933. He served with the Seabees in World War II for 2 ½ years.

Surviving are a son, Robert, Shelby; a brother, William, Gig Harbor, Wash., and three sisters, Mrs. Myrtle Johnson, Shelby; Mrs. William Simpson, Whitefish, and Stella West, Palouse, Wash.

Graveside services will be at 2 Tuesday afternoon and burial will be in the Veterans Plot at Mountain View Cemetery.

The death raises the highway traffic toll in Montana to 247.
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Ancestry.com – US Headstone Applications for Militay Veterans 1925-1963
Robert Henry Cockrell; Birth Date: 28 Aug 1898; Death Date: 12 Oct 1961; Cemetery: Mountain View Cemetery; Cemetery Location: Shelby, Montana
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Ancestry.com – US WWI Draft Registration Cards, 1917-1918
Robert Henry Cockrell; Race: White; Birth Date: 28 Oct 1898; Residence Place: Toole, Montana; Relative: Columbus J. Cockrell [filed 12 Sep 1918]
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Ancestry.com – Idaho Birth Index 1861-1916, Stillbirth Index 1905-1966
Robert Henry Cockrell; Birth Date: 28 Oct 1898; Birth Place: Cora, Latah, Idaho; Father: Columbus Jefferson Cockrell; Mother: Hettie Griner; Certificate Year: 1898; Certificate #: 375981
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1900 census – Cora, Latah, Idaho
Columbus Cockrell, Head, 44, b. Apr 1856 MO
Hattie/Hettie Cockrell, Wife, 35, b. Jan 1865 PA
Mary Cockrell, daughter, 16, b. Sep 1883 KS
Stella Cockrell, daughter, 14, b. Aug 1885 KS
Otha Cockrell, son, 13, b. Mar 1887 KS
Alie/Alice Cockrell, daughter, 10, b. Aug 1889 WA
John Cockrell, son, 8, b. Apr 1892 ID
Myrtle Cockrell, daughter, 6, b. Nov 1893 ID
Elcie/Elsie Cockrell, daughter, 4, b. Jul 1895 ID
Robert Cockrell, son 1, b. Nov 1898 ID
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1910 census – Spokane, Ward 5, Spokane, Washington; 11 East Main Avenue
Columbus J. Cockrell, Head, 54, b. MO
Hettie Cockrell, Wife, 44, b. PA
Myrtle L. Cockrell, daughter, 13, b. ID
Robert H., son 11, b. ID
Ester K. Cockrell, daughter, 5, b. ID
William T. Cockrell, son, 1, b. ID
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1920 census – Whitefish, Flathead, Montana; 1044 Third St.
Household of brother, John G. Cockrell, 28, b. ID; locomotive fireman railroad.
Robert H. Cockrell, age 21, b. ID; laborer woods
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Montana, County Marriages - Libby, Lincoln County, Montana; 05 Feb 1923.
Name: Robert H Cockrell, 24; resident of Galata, Montana
Spouse: Mary T Wood, 38; divorced; resident of Libby, Montana
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1930 census – Whitefish, Flathead, Montana; 39 O'Brien
Head: Robert H. Cockrell, 31, b. ID; laborer transfer co.
Wife: Mary A Cockrell, 45
Stepdaughters: Mary E Wood, 16; Hazel L Wood, 11
Son: Robert H, 6
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1940 census – Shelby, Toole, Montana; resident of the Rex Hotel.
Robert H. Cockrell, age 41, b. ID; married crossed-out; carpenter home const.
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Military Service - US Naval Reserves World War II - Rank CM1:
Mechanic Petty Officer 1st Class
Carpenter's Mate 1st Class
Construction Mechanic Petty Officer