Comparison of Characteristics Surrounding the Homicides Between Predominantly Impulsive and Proactive Groups
All Subjects (N = 47) | Predominant Impulsive (n = 27) | Predominant Proactive (n = 20) | |||||
---|---|---|---|---|---|---|---|
n | % | n | % | n | % | Test Statistics, p | |
Psychotically motivated homicide | 44 | 93.6 | 24 | 88.9 | 20 | 100 | χ2 = 2.374; p = .251a |
Multiple victims | 5 | 10.6 | 3 | 11.1 | 2 | 10 | χ2 = . 015; p = 1.000a |
Treatment nonadherence in the index homicide | 42 | 89.4 | 24 | 88.9 | 18 | 90 | χ2 = . 015; p = 1.000a |
Victim-perpetrator relationship | χ2 = 8.096; p = .424 | ||||||
Parents | 14 | 29.8 | 8 | 29.6 | 6 | 30 | |
Intimate partner | 5 | 10.6 | 1 | 3.7 | 4 | 20 | |
Children | 1 | 2.1 | 0 | 0 | 1 | 5 | |
Siblings | 6 | 12.8 | 4 | 14.8 | 2 | 10 | |
Nonfamily acquaintance | 17 | 36.1 | 11 | 40.8 | 6 | 30 | |
Stranger | 4 | 8.5 | 3 | 11.1 | 1 | 5 | |
Method/weapon | χ2 = 8.646; p = .029 | ||||||
Sharp instrument | 32 | 68.1 | 21 | 77.8 | 11 | 55 | |
Firearmsb | 7 | 14.9 | 1 | 3.7 | 6 | 30 | |
Blunt | 5 | 10.6 | 4 | 14.8 | 1 | 5.0 | |
Strangulation | 2 | 4.3 | 1 | 3.7 | 1 | 5 | |
Pushing from a height | 1 | 2.1 | 0 | 0 | 1 | 5 | |
Place | χ2 = 2.605; p = .107 | ||||||
Public place | 18 | 38.3 | 13 | 48.1 | 5 | 25 | |
Private property | 29 | 61.7 | 14 | 51.9 | 15 | 75 | |
Intoxicated offender | χ2 = 1.897; p = .387 | ||||||
No | 39 | 83 | 21 | 77.8 | 18 | 90 | |
Alcohol | 6 | 12.8 | 4 | 14.8 | 2 | 10 | |
Drugs | 2 | 4.3 | 2 | 7.4 | 0 | 0 | |
Accompanying delusions | χ2 = 13.653; p = .006 | ||||||
No | 4 | 8.5 | 4 | 14.8 | 0 | 0 | |
Persecutory/threat | 15 | 31.9 | 11 | 40.7 | 4 | 20 | |
Referential/Control-override | 6 | 12.8 | 5 | 18.5 | 1 | 5 | |
Infidelityb | 8 | 17 | 2 | 7.4 | 6 | 30 | |
More than one type | 14 | 29.8 | 5 | 18.5 | 9 | 45 | |
Accompanying hallucinations | χ2 = 3.758; p = .289 | ||||||
No | 34 | 72.3 | 18 | 66.7 | 16 | 80 | |
Auditory-Command | 10 | 21.3 | 7 | 25.9 | 3 | 15 | |
Auditory-Elementary | 2 | 4.3 | 2 | 7.4 | 0 | 0 | |
Visual | 1 | 2.1 | 0 | 0 | 1 | 5 |