Bivariate analysis by crime scene locations: comparing known offenders and strangers to the victim (n = 440)
| All cases (n = 440) | Outdoor crime scene (n = 151) | Indoor crime scene (n =289) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Variable | Known (n = 237) | Stranger (n = 203) | Total (n) | Phi | Known (n = 83) | Stranger (n = 68) | Total (n) | Phi | Known (n = 154) | Stranger (n = 135) | Total (n) | Phi |
| Victim characteristics | ||||||||||||
| Victim is female | 83.5% (198) | 87.7% (178) | 85.5% (376) | 0.06 | 85.5% (71) | 89.7% (61) | 87.4% (132) | 0.06 | 82.5% (127) | 86.7% (117) | 84.4% (244) | 0.06 |
| Victim lived alone | 16.5% (39) | 22.7% (46) | 19.3% (85) | 0.08 | 14.5% (12) | 22.1% (15) | 17.9% (27) | 0.1 | 17.5% (27) | 23% (31) | 20.1% (58) | 0.07 |
| Victim has vulnerable background | 41.8% (99) | 27.6% (56) | 35.2% (155) | 0.15** | 41% (34) | 29.4% (20) | 35.8% (54) | 0.12 | 42.2% (65) | 26.7% (36) | 34.9% (101) | 0.16** |
| Crime behaviors | ||||||||||||
| Victim targeted | 39.2% (93) | 20.2% (41) | 30.5% (134) | 0.21*** | 43.4% (36) | 16.2% (11) | 31.1% (47) | 0.29*** | 37% (57) | 22.2% (30) | 30.1% (87) | 0.16** |
| Approach victim using a con | 54% (128) | 49.8% (101) | 52% (229) | 0.04 | 63.9% (53) | 55.9% (38) | 60.3% (91) | 0.08 | 48.7% (75) | 46.7% (63) | 47.8% (138) | 0.02 |
| Offender brought a weapon | 26.6% (63) | 46.3% (94) | 35.7% (157) | 0.21*** | 28.9% (24) | 51.5% (35) | 39.1% (59) | 0.23** | 25.3% (39) | 43.7% (59) | 33.9% (98) | 0.19** |
| Contact/personal weapon | 46.8% (111) | 53.2% (108) | 49.8% (219) | 0.06 | 47% (39) | 47.1% (32) | 47% (71) | 0 | 46.8% (72) | 56.3% (76) | 51.2% (148) | 0.1 |
| Edged weapon | 30% (71) | 40.4% (82) | 34.8% (153) | 0.11* | 22.9% (19) | 42.6% (29) | 31.8% (48) | 0.21** | 33.8% (52) | 39.3% (53) | 36.3% (105) | 0.06 |
| Physical restraint was used | 19.4% (46) | 15.8% (32) | 17.7% (78) | 0.05 | 25.3% (21) | 4.4% (3) | 15.9% (24) | 0.28*** | 16.2% (25) | 21.5% (29) | 18.7% (54) | 0.07 |
| Overkill | 29.1% (69) | 13.8% (28) | 22% (97) | 0.18*** | 26.5% (22) | 17.6% (12) | 22.5% (34) | 0.11 | 30.5% (47) | 11.9% (16) | 21.8% (63) | 0.23*** |
| Fellatio | 8% (19) | 20.7% (42) | 13.9% (61) | 0.18*** | 6% (5) | 23.5% (16) | 13.9% (21) | 0.25** | 9.1% (14) | 19.3% (26) | 13.8% (40) | 0.15* |
| Multiple sexual acts | 38.4% (91) | 53.2% (108) | 45.2% (199) | 0.15** | 38.6% (32) | 54.4% (37) | 45.7% (69) | 0.16 | 38.3% (59) | 52.6% (71) | 45% (130) | 0.14* |
| Post crime behaviors | ||||||||||||
| Body moved | 32.1% (76) | 21.2% (43) | 27% (119) | 0.12** | 31.3% (26) | 25% (17) | 28.5% (43) | 0.07 | 32.5% (50) | 19.3% (26) | 26.3% (76) | 0.15* |
| Attempt to conceal body | 32.5% (77) | 28.6% (58) | 30.7% (135) | 0.04 | 31.3% (26) | 26.5% (18) | 29.1% (44) | 0.05 | 33.1% (51) | 29.6% (40) | 31.5% (91) | 0.04 |
| Items taken | 31.6% (75) | 52.7% (107) | 41.4% (182) | 0.21*** | 32.5% (27) | 41.2% (28) | 36.4% (55) | 0.09 | 31.2% (48) | 58.5% (79) | 43.9% (127) | 0.28*** |
| All cases ( | Outdoor crime scene ( | Indoor crime scene ( | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Variable | Known ( | Stranger ( | Total ( | Phi | Known ( | Stranger ( | Total ( | Phi | Known ( | Stranger ( | Total ( | Phi |
| Victim is female | 83.5% (198) | 87.7% (178) | 85.5% (376) | 0.06 | 85.5% (71) | 89.7% (61) | 87.4% (132) | 0.06 | 82.5% (127) | 86.7% (117) | 84.4% (244) | 0.06 |
| Victim lived alone | 16.5% (39) | 22.7% (46) | 19.3% (85) | 0.08 | 14.5% (12) | 22.1% (15) | 17.9% (27) | 0.1 | 17.5% (27) | 23% (31) | 20.1% (58) | 0.07 |
| Victim has vulnerable background | 41.8% (99) | 27.6% (56) | 35.2% (155) | 0.15 | 41% (34) | 29.4% (20) | 35.8% (54) | 0.12 | 42.2% (65) | 26.7% (36) | 34.9% (101) | 0.16 |
| Victim targeted | 39.2% (93) | 20.2% (41) | 30.5% (134) | 0.21 | 43.4% (36) | 16.2% (11) | 31.1% (47) | 0.29 | 37% (57) | 22.2% (30) | 30.1% (87) | 0.16 |
| Approach victim using a con | 54% (128) | 49.8% (101) | 52% (229) | 0.04 | 63.9% (53) | 55.9% (38) | 60.3% (91) | 0.08 | 48.7% (75) | 46.7% (63) | 47.8% (138) | 0.02 |
| Offender brought a weapon | 26.6% (63) | 46.3% (94) | 35.7% (157) | 0.21 | 28.9% (24) | 51.5% (35) | 39.1% (59) | 0.23 | 25.3% (39) | 43.7% (59) | 33.9% (98) | 0.19 |
| Contact/personal weapon | 46.8% (111) | 53.2% (108) | 49.8% (219) | 0.06 | 47% (39) | 47.1% (32) | 47% (71) | 0 | 46.8% (72) | 56.3% (76) | 51.2% (148) | 0.1 |
| Edged weapon | 30% (71) | 40.4% (82) | 34.8% (153) | 0.11 | 22.9% (19) | 42.6% (29) | 31.8% (48) | 0.21 | 33.8% (52) | 39.3% (53) | 36.3% (105) | 0.06 |
| Physical restraint was used | 19.4% (46) | 15.8% (32) | 17.7% (78) | 0.05 | 25.3% (21) | 4.4% (3) | 15.9% (24) | 0.28 | 16.2% (25) | 21.5% (29) | 18.7% (54) | 0.07 |
| Overkill | 29.1% (69) | 13.8% (28) | 22% (97) | 0.18 | 26.5% (22) | 17.6% (12) | 22.5% (34) | 0.11 | 30.5% (47) | 11.9% (16) | 21.8% (63) | 0.23 |
| Fellatio | 8% (19) | 20.7% (42) | 13.9% (61) | 0.18 | 6% (5) | 23.5% (16) | 13.9% (21) | 0.25 | 9.1% (14) | 19.3% (26) | 13.8% (40) | 0.15 |
| Multiple sexual acts | 38.4% (91) | 53.2% (108) | 45.2% (199) | 0.15 | 38.6% (32) | 54.4% (37) | 45.7% (69) | 0.16 | 38.3% (59) | 52.6% (71) | 45% (130) | 0.14 |
| Body moved | 32.1% (76) | 21.2% (43) | 27% (119) | 0.12 | 31.3% (26) | 25% (17) | 28.5% (43) | 0.07 | 32.5% (50) | 19.3% (26) | 26.3% (76) | 0.15 |
| Attempt to conceal body | 32.5% (77) | 28.6% (58) | 30.7% (135) | 0.04 | 31.3% (26) | 26.5% (18) | 29.1% (44) | 0.05 | 33.1% (51) | 29.6% (40) | 31.5% (91) | 0.04 |
| Items taken | 31.6% (75) | 52.7% (107) | 41.4% (182) | 0.21 | 32.5% (27) | 41.2% (28) | 36.4% (55) | 0.09 | 31.2% (48) | 58.5% (79) | 43.9% (127) | 0.28 |
*p < 0.05; **p < 0.01; ***p < 0.001
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