We seem to be living in violent times. While there is such a thing as a Criminal Personality (see Gudjonson #24126 and James #2335,) many other things are involved. A criminal inclination can be part of an anti-social personality (Henderson #3077).

There can be a history of family or marital problems.  School or employment problems are likely as is the absence of positive leisure activities.
The person may be egocentric or impulsive. He or she may have low self-esteem, strong mood swings and/or high anxiety. There may be substance abuse.  Lack of social skills and absence of a social network are common.
There may be strong sensation-seeking drives (Green #12016, Jason #6063, Rowland #10557, Walker #6372.)
He or she may also have a fascination with death, and use such points as Orpheus,  Morden, Osiris and Phoinix to represent Death.
While Leto #68 can mean “to kill,” see the Mundane section of Research Access for Mass Killings and Serial Killers.
As well as Toro for aggression and brutality, there are asteroids Beate and Savage.  Too, there are asteroids for sadism, rape, the murder of family members and more.  Again, these can be found in the Mundane section of Research Access.
While Zeus is one point for guns, Wesson is another and  you could use Hopi or Russell #1726 for knives.
We’ve been seeing the increase in criminal behavior under the transiting Hades-Kronos conjunction in Cancer, now in 11 and 14 Cancer to the US chart’s Sun in 13 Cancer.  There has been actions against the (Kronos) laws and police.  There is (Hades) deterioration and corruption of (Kronos) officials and (Hades) vulgarity from (Kronos) celebrities. I’m sure you can think of other examples.
As you use the criminal indices, be sure to focus on the dial axis of the Personal Points: the angles, luminaries and Aries Point.
~m