CALIFORNIA EVIDENCE: CIVIL AND CRIMINAL
...Opinion & Scientific Evidence
......Forensic Issues
.........Criminal
............Toolmarks and Similar Markings
3 Cards On This Topic:

When the continuing admissibility of tool marks ballistic comparison is at issue, the burden shifts to the opposing party to produce new evidence showing it is no longer generally accepted as reliable.

Expert testimony properly admitted to show a mark on body could have been made by handcuffs.

Experience in comparison of physical objects qualifies witness to testify; opinion of "similarity" of tire tracks sufficiently probative to be admitted.