← All EvidenceDirectDavid Cahill — Direct Examination David Cahill Steven D. Mellin
Physical Evidence
Five MIT discharged 9 mm cartridge casings, which Cahill identified as fired by the same then-unknown weapon
David Cahill identified five discharged 9 mm Luger cartridge casings recovered at MIT, three outside and two inside Collier's cruiser. His microscopic comparison determined that all five had been fired by the same then-unknown weapon.