Subject
Murder
186
Investigation
152
Missing persons
76
History
53
Police
52
Crimes against
42
Family secrets
39
Conspiracies
30
Secrecy
29
Kidnapping
28
Man-woman relationships
28
Serial murderers
27
Families
25
Americans
23
Revenge
23
Private investigators
22
Cold cases (Criminal investigation)
20
Women
20
Assassins
19
Drug traffic
18
Death
17
Intelligence officers
17
Women detectives
17
Criminals
16
Journalists
16
Missing children
16
Organized crime
16
Young women
16
Terrorism
15
Ex-police officers
14
Life change events
14
Sisters
14
Mothers and daughters
13
Serial murder investigation
13
Authors
12
Interpersonal relations
12
Psychopaths
12
College teachers
11
Fathers and daughters
11
Fathers and sons
11
Friendship
11
Good and evil
11
Social life and customs
11
Veterans
11
Brothers
10
Married people
10
Officials and employees
10
Psychologists
10
Race relations
10
Rich people
10
more ...