Since when is concealing a body murder? I hope this Dick Tracey can put more together than that. The murder charge will arise most likely out of the fact he was alive when she had returned home, and she let him die. In other words murder by inaction as opposed to action...Just running someone over is not murder, its premeditation and/or intent and the dying part that makes it murder...the fact she let him die makes it premeditated instead of what would be normally manslaughter.
My two cents
In fact, the mere act of imprisoning him in her home and not allowing him to leave and receive medical attention might qualify as kidnapping, which is a felony. In most states anytime a person dies during the commission of a felony, it is "felony murder," and whether or not she intended to kill him is irrelevant.
Huh?
What "inaction" are you talking about?
She rammed him through her windshield and kept him there until he was dead.
That's about as "inactive" as "hanged until dead" at a gallows.