Final answer:
Yes, Todd could potentially be charged with aggravated robbery in this situation.
Step-by-step explanation:
In this situation, Todd could potentially be charged with aggravated robbery. Aggravated robbery typically involves the use of a dangerous weapon or the threat of the use of a dangerous weapon during the commission of a robbery.
In this case, Todd indicated to Madeline that he is armed with a knife while robbing her. This can be seen as a threat of the use of a dangerous weapon and could meet the criteria for aggravated robbery.
However, it is important to note that the specifics of the law may vary depending on the jurisdiction. It is best to consult a legal professional or refer to the specific laws in your area for a definitive answer.