criminalistics
noun
crim·i·nal·is·tics ˌkri-mə-nə-ˈli-stiks 
ˌkrim-nə-ˈli-
plural in form but singular in construction
: application of scientific techniques in collecting and analyzing physical evidence in criminal cases
Example Sentences
Recent Examples on the Web Hatten is still employed by the Las Vegas police department, assigned to the criminalistics bureau, which includes crime scene investigations, the Review-Journal reported. 
Fox News, 29 Dec. 2021
Fox News, 29 Dec. 2021 Word History
Etymology
criminal entry 1 + -ist entry 1 + -ics
First Known Use
1910, in the meaning defined above
Legal Definition
criminalistics
noun plural but singular in construction
crim·i·nal·is·tics ˌkri-mə-nə-ˈlis-tiks
: application of scientific techniques in collecting and analyzing physical evidence in criminal cases