<C. Lying in Wait>
[The defendant is guilty of first degree murder if the People have proved that the defendant murdered while lying in wait or immediately thereafter. The defendant murdered by lying in wait if:
1. (he/she) concealed (his/her) purpose from the person killed;
2. (he/she) waited and watched for an opportunity to act;
AND
3. Then, from a position of advantage, (he/she) intended to and did make a surprise attack on the person killed.
The lying in wait does not need to continue for any particular period of time, but its duration must show a state of mind equivalent to deliberation and premeditation. [Deliberation means carefully weighing the considerations for and against a choice and, knowing the consequences, deciding to act. An act is done with premeditation if the decision to commit the act is made before the act is done.]
[A person can conceal his or her purpose even if the person killed is aware of the person's physical presence.]
[The concealment can be accomplished by ambush or some other secret plan.]
The only problem with this is he would know he was taking a gamble and be at risk of being classed as a suspect living so close but he also knew Greg would not be there.