| Region 4 | ||||||||||||||||
| Homicides | ||||||||||||||||
| Source: Crime in Idaho Report | ||||||||||||||||
| 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | ||
| Ada | 9 | 1 | 6 | 6 | 2 | 4 | 4 | 3 | 2 | 3 | 6 | 7 | 0 | 7 | 5 | |
| Boise | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | |
| Elmore | 0 | 4 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 3 | 1 | 1 | 1 | 0 | |
| Valley | 1 | 0 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | |
| *Numbers beginning in 2002 are murders reported per county. | ||||||||||||||||