tire impressions

tires provide CSI with 2 forms of evidence which are

tire tracks and tread patterns

every brand of tire has a different

tread pattern

as tires are used they develop

unique wear patterns that can indicate their usage history.

wear bars

are indicators on tires that show when tread depth is too low, signifying the need for replacement. the relative depth of the wear bar can be measured in 3D tire impressions

each tire mold may have

slight irregularities that can help narrow down the amount of tires that were produced or identify specific tires involved in incidents.

all tire impression evidence

is photographed