专家正在建立一个数据库，该数据库能够识别涉案犬只的品种，或排除犬只嫌疑。从追踪罪犯到嗅探毒品，犬只长期以来一直协助警方破案。如今专家希望建立犬只DNA数据库，能提供关键线索。
Experts working on database that could identify particular breeds involved in crimes, or rule out canine suspects From tracking criminals to sniffing out drugs, dogs have long helped police crack cases. Now experts are hoping a database of canine DNA could offer vital leads.
虽然犯罪现场或与案件相关人员身上可能发现毛发、唾液等犬只物质，但科学家表示，这些物证往往未被充分调查。
While hair, saliva and other canine material may be found at crime scenes, or on individuals connected to incidents, scientists say they are often not fully investigated.