J. C. Day Biography

Day's crime-scene work included processing cartons around the southeast sixth-floor window for latent fingerprints and palmprints.

Day photographed the three cartridge cases in their original sixth-floor positions before investigators moved or collected them.

Day examined the long handmade paper bag found near the southeast sixth-floor window and preserved it as evidence from the suspected firing position.

Day developed and lifted a palmprint from the underside of the rifle barrel during laboratory examination of the assassination weapon.

Day documented the rifle where it lay between cartons before officers lifted the weapon from its concealed position.

Day examined the bolt knob and wooden stock for usable fingerprints before handling the rifle and determined that those surfaces yielded no identifiable prints.

Day retained possession of the rifle after its removal from the Depository and transported it to Dallas Police headquarters for further examination.

Day directed collection of paper and tape samples from the Depository shipping area so they could be compared with the long paper bag.