It is probably a teenager into Satan stuff. That involves Tarot cards.
There is a sniper video game that at one point says "I am God".
It is probably like the teenagers in Colorado who shot up their school and killed a bunch of people.
They are looking at the wrong profile.
I tend to lean towards the terrorist explanation (on a poll on www.courttv.com early this morning only 30% felt it was a case of terrorism.)
It could also be members of Hispanic gangs active in the DC area, perhaps part of initiation into the superviolent Salvadorean MS-13 which has chapters across the country. Or one of the many Asian gangs active in the DC area. So far no Asian victims.
It could be also some crazy cult members, such as surviving member of Rev. Jim Jones's Death Squad. Jones used to scream "I am God." The black cult leader, Father Divine, likewise declared himself as God.
What's the name of the game in question? Personally, I think that's just tripe served by Bo Diddle to justify his talking head appearances.
Satanic teenagers wait around patiently, taking only one victim, with one shot, each time?
No, that's not a profile of the behavior of instant-gratification teenagers...