The percentage of crimes that are "solved" is called the closure rate. It typically is about 33% for felonies like robbery.ELB wrote:... there were about 900 robberies in San Antonio each year, and IIRC, only about one-third of them got solved.
This was 1998, so the info is a decade+ out of date, but I'll bet it is not that much different.
The authorities are also generous to themselves with the definition of closure. It pretty much means they identified a suspect, regardless of whether he ever is arrested, charged, or convicted. Some suspects become fugitives, are never found, or are in prison or dead by the time they are identified. (Crime is one of the more dangerous occupations.)
Also the rate of crimes that are reported is quite a bit less than crimes committed. Many victims do not report crimes because they are apathetic or were themselves engaged in something illegal (drug dealers or prostitutes who are robbed, for example).
- Jim