Each member of the Mississippi Highway Safety Patrol or agent of the Mississippi Bureau of Narcotics who retires under the Highway Safety Patrol Retirement System or the Public Employees' Retirement System, for superannuation or for reason of disability or a beneficiary of such member of the Highway Safety Patrol or agent of the Mississippi Bureau of Narcotics who is killed in the line of duty shall be allowed to retain, as his personal property, one (1) sidearm which was issued under authority of Section 45-3-19 or 41-29-159. Likewise, a beneficiary of any law enforcement officer killed in the line of duty shall be allowed to retain the officer's sidearm.