Serial 2334

Report of the FBI LABORATORY
FEDERAL BUREAU OF INVESTIGATION
WASHINGTON, D.C. 20535

December 22, 1978

To: Commissioner
Guyana Police Department
Georgetown, Guyana, South America
Attention: Mr. C. A. Roberts
Assistant Police Commissioner
Criminal Investigations Division

Re: Unknown Subjects;
Congressman Leo J. Ryan
(Deceased) – Victim;
Congressional Assassination Statute;
Foreign Police Cooperation

Examination requested by: Addressee
Reference: [Blank]
Examination requested: Firearms
FBI file no: 89-4286
Lab. No.: 81219043 S NM

Specimens received from Detective Inspector Jag Mohan on December 22, 1978:

Q1 – Four pieces of shot from Patricia Park [Parks] (J57 [Balance of line illegible]

Q2-Q4 – Two bullets and a lead fragment from Leo Ryan [Balance of line illegible]

Q5-Q7 – Bullet, bullet jacket and a lead core from Bob Brown (J59HQ)

Q8 – Bullet from Don Harris (J56HQ)

Q9-A10 – Two bullets from Monica Bagby (J60HQ)

Q11-Q47 – Five .380 Auto cartridge cases and two 308 Winchester caliber cartridge cases from Kaituma airstrip (J54HQ)

[Page 2]

K1 – .38 Special Smith and Wesson revolver, Model 36, Serial Number 6OJ953 with five cartridges, recovered from Michael Carter (J55HQ)

K2 – .38 Special Smith and Wesson revolver, Model 36, Serial Number 5J4831, with five cartridges, recovered from Michael Crooks [Prokes] (J62HQ)

K3 – .38 Special Smith and Wesson revolver, Model 36, Serial Number J298732, with one cartridge, recovered from Larry Layton (J61HQ)

Items received on December 5, 1978, from Detective Assistant Superintendent E. V. Kendall:

K4 – .38 Special Smith and Wesson, Model 10, revolver, Serial Number C 911747

K5 – .357 Magnum Ruger, Security Six, revolver, Serial Number 159-12987

K6 – .22 caliber Harrington and Richardson, Model 922, revolver, Serial Number K8657

K7 – .22 caliber Liberty Arms Corporation, Model Liberty 21, revolver, Serial Number 40805

K8 – .38 Special Smith and Wesson, Model 36, revolver, Serial Number 273666

K9 – .22 caliber Ruger automatic pistol, Searle Number 13-11054

K10 – .38 Special Smith and Wesson revolver, Serial Number S820402

K11 – .380 Auto Walther, PPE/S, automatic pistol, Serial Number 1381085

K12 – .25 Auto Colt automatic pistol, Serial Number 218752

K13 – .22 caliber High Standard, Duramatic model, automatic pistol, Serial Number 512543

K14 – .308 Winchester caliber Remington, Model 742, carbine, Serial Number 46316.

[Page 3]

K15 – .308 Winchester caliber Remington, Model 700, rifle, Serial Number 6742465

K16 – .30-06 Springfield caliber Remington, Model 742, rifle, Serial Number 15824

K17 – .30-06 Springfield caliber Browning rifle, Serial Number 75866119

K18 – .308 Winchester caliber Remington, Model 788, rifle, Serial Number 6110319, with telescope

K19 – 30-06 Springfield caliber Remington, Model 742, rifle, Serial Number A7402065

K20 – .308 Winchester caliber Winchester, Model 88, rifle, Serial Number 82976, with telescope

K21 – .243 Winchester caliber Ruger, Model 77, rifle[,] Serial Number 72-24208 with telescope

K22 – .30 caliber US Carbine, Mi, Serial Number 3084280

K23 – .22 caliber Ruger, Model 10-22, rifle, Serial Number 116-53921

K24 – .22 caliber Western Field, Model 88A-ECH, rifle, no serial number

K25 – .22 caliber Armalite, AR-7 Explorer, rifle, Serial Number 73270

K26 – .30-30 Winchester caliber Winchester, Model 94 Canadian Centennial, rifle, Serial Number 36519

K27 – .30-30 Winchester caliber Sears, Model 54, rifle, Serial Number 34912

K28 – 12-gauge Remington, Model 870, shotgun, Serial Number T019755M

K29 – 12-gauge Universal Arms, Auto-Wing model, shotgun, Serial Number D 3447

[Page 4]

K30 – 12-gauge Savage, Model 6670M, shotgun, no serial number

K31 – 12-gauge J. C. Higgins, Model 60, shotgun, no serial number

K32 – 12-gauge Remington, Model 870, shotgun, Serial Number S 946514M

K33 – 12-gauge Remington, Model 11, shotgun, Serial Number 773398

K34 – 12-gauge Western Field, Model MNU-565D, shotgun, no serial number

K35 – 16-gauge Stevens, Model 94H, shotgun, Serial Number A171004

Items received on December 11, 1978, from Detective Assistant Superintendent E. V. Kendall:

Q18-Q20 – Two bullet jackets and a lead bullet core

Q21-Q22 – Two .30-06 Springfield caliber cartridge cases

Q23-Q27 – Five .22 caliber cartridge cases

Q28-Q29 Two wads

Results of examination:

This report supplements and confirms the preliminary report furnished your office on December 12, 1978.

Specimen Q1 consists of four pieces of lead shot which have been determined to be size “F”. This size of shot is not commercially loaded into shot shells in either the United States or Great Britain. However, size “F” shot is available in many countries for hand or reloading purposes.

[Page 5]

Specimen Q2 is a .38 Special or a .357 Magnum bullet jacket which has been fired from a barrel rifled with six grooves, right twist, such as the K5 revolver. However, the barrel of specimen K5 was found to contain a large quantity of foreign material and corrosion which affected the microscopic markings used in identification. Therefore, it was not possible to determine if Q2 had been fired from K5. None of the other recovered weapons could have fired Q2.

Specimen Q3 was identified as having been fired from the K15 rifle.

Specimens Q4, Q6 and Q20 are lead cores from jacketed bullets which do not contain any marks of value for identification purposes. Therefore, the origin of Q4, Q6 and Q20 could not be determined.

Specimens Q5 and Q18 are .30 caliber bullet jackets which were fired from a barrel(s) rifled with four grooves, right twist such as the barrels in the K17 and K20 rifles. However, due to a lack of sufficient matching microscopic marks between Q5, Q18 and test bullets fired from K17 and K20, it was not possible to determine if Q5 or Q18 had been fired from K17 or K20.

Specimen Q7 os a .380 Auto caliber jacketed bullet which was fired from a barrel rifle with six grooves, right twist. Although the barrel of the K11 pistol contained six grooves, right twist, nothing was found to indicate that Q7 had been fired from K11.

Specimens Q8 and Q19 are .30 caliber bullet jackets which were fired from a barrel(s) rifled with six grooves, right twist such as the barrels in the K14 and K15 rifles. However, there are not sufficient microscopic marks of value for identification purposes in either Q8 or Q19. Therefore, it was not possible to determine if they had been fired from K14 or K15.

The Q9 and Q10 bullets were identified as having been fired from the K3 revolver.

[Page 6]

The Q11 through Q15 cartridge cases were identified as having been fired in the same firearm; however, they were not fired in specimen K11.

Specimen Q16 was not fired in any of the recovered .308 Winchester caliber firearms.

Specimen Q17 was identified as having been fired in the K15 rifle.

Specimen Q21 does not contain sufficient microscopic marks of value for identification purposes. Therefore, it was not possible to determine if Q21 had been fired in K19 or K17. Specimen Q21 was not fired in K16.

Specimen Q22 does not contain sufficient microscopic marks of value for identification purposes. Therefore, it was not possible to determine if Q22 was fired in K17. Specimen Q22 was not fired in K16 or K19.

The Q23 through Q27 cartridge cases were identified as having been fired by the K23 rifle.

Specimens Q28 and Q29 are consistent with 16-gauge shot shell wads but could not be identified further.

[Page 7 – Laboratory worksheet]

Originally posted on November 10th, 2020.

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