An important fact to consider is, in England, a dead body that died not of disease or accident is not counted as a murder until the perp has been found and tried*. So a lifeless body that resulted from an anonymous drive-by does not count as a murder until the courts settle everything including naming he suspect and trying them.
No wonder their murder rate is lo low!
Here, a body is counted as a murder if it was not natural causes even if the perp is not named.
*The coroner cannot say a dead body was murdered, because it then prejudges the accused, once the accused is found.
Our murder rate is low because we don’t go about murdering each other.