CALEB GRAVES, 33, of Del City, and ROBERT ALLEN KEEFE, 25, of Oklahoma City, have been sentenced to a combined total of over nine years in federal prison for illegal possession of ammunition and possession of an unregistered destructive device. The announcement was made by U.S. Attorney Robert J. Troester.
Graves was initially charged on November 6, 2024, with being a convicted felon in possession of ammunition. Additional charges were filed against him on April 1, 2025, including possession of an unregistered destructive device and felon in possession of a firearm described as an improvised explosive bomb. Keefe was also charged on April 1, 2025, with possession of an unregistered destructive device related to the same incident involving the pipe bomb. Under federal law, both firearms and pipe bombs are classified as destructive devices.
According to public records, on August 18, 2024, officers from the Village Police Department stopped Graves’ vehicle and found a loaded firearm magazine. The next day, agents from the Bureau of Alcohol, Tobacco, Firearms and Explosives executed a search warrant at Graves’ residence and discovered several rounds of ammunition in his vehicle. While awaiting trial on pretrial release, Graves was arrested again on October 14, 2024. During this traffic stop by Oklahoma City Police Department officers, a hidden pipe bomb was located in his vehicle. Keefe was present as the only other passenger and was also arrested.
On June 6, 2025, Graves pled guilty to being a felon in possession of ammunition and a felon in possession of a firearm—specifically an improvised explosive bomb. Federal law prohibits individuals previously convicted of felonies from possessing ammunition or firearms such as bombs. Keefe pled guilty on June 9, 2025 to possessing an unregistered destructive device.
Public records show that Graves has previous felony convictions in Oklahoma County District Court for second degree burglary; possession of stolen property; conspiracy to commit a felony; possession of methamphetamine; child neglect; and possession of contraband in a penal institution.
During sentencing hearings held this month before U.S. District Judge David L. Russell, Graves received a sentence of 72 months in federal prison while Keefe received a sentence of 37 months. Both will be subject to three years supervised release after their prison terms are complete. In announcing the sentences Judge Russell noted “the seriousness of the offense and the need to provide just punishment.”
The investigation involved the Bureau of Alcohol, Tobacco, Firearms and Explosives along with assistance from the Village Police Department and Oklahoma City Police Department. Assistant U.S. Attorney Drew E. Davis prosecuted the case.
Reference is made to public filings for additional information.
