The Toronto Police Service has 17 divisions in the city. Each of those 17 divisions has a 6 person technical investigation unit that concentrates on assignments forwarded to them from the other investigative units, like the robbery, fugitive, sex crimes, auto theft, and gangs unit.
The tech units use a wide array of resources, including the CCTV cameras of the Toronto Transit Corporation, street cameras operated by TPS, public TV cameras at place like City Hall square, and the highway cameras of the Toronto Transportation system. IN addition they scan the facebook groups of known criminals and gangs.
(Yes the idiots have their own bragging facebook pages where they show off their latest gun or bundles of money, for their friend's camera ). Street racers also are monitored on their facebook pages, so the Police know ahead of time, about planned car meet ups where stunt driving/ street racing will take place.
The Toronto Homicide unit has it's own in house tech unit, that focuses on finding information about the victims, and running down the potential suspects. The Cold Case unit also has a tech unit that works cases ( usually homicides ) from the past. They have been solving cases now that are up to 40 years old, through DNA testing of old evidence materials. If properly stored at the time of the crime, those materials can now be tested to find latent DNA traces.
In a recent Toronto homicide trial of a 35 year old case, the DNA expert stated that the accused was the one whose DNA was found on the clothing from the victim , to a certainty of one out of 21 TRILLION other people. Convicted.
One of their biggest assets now is the fact that so many people have sent their DNA in to be tested by private labs , in an attempt to trace their ancestors. Those private DNA data banks hold information that can be used to find blood relations, who might be the wanted criminal. A recent Toronto old case was solved in just that way. Unfortunately in that case, the killer had died a few years before the evidence was established. But at least the victim's family was finally able to know who did it back then.
Technical policing is the new tool for cops who obviously need to be specially trained to use the technology properly. Some smaller Canadian Police services are hiring civilian experts in high tech fields so they have the skills required, without that person going through the Police College, first
JimB.