[KevinP73]

If he's here in Van Nuys I have a suggestion. There is a cozy little Italian place up on Venture Blvd in Studio City. Have him take her in for a romantic dinner, couple glasses of wine and some music. After dinner he can take her out to the car(there is always parking available in the alley out back). Upon seating her in the car he'll notice that he has left his hand gun inside on the table. Leave her outside and return indoors to get his gun. When he returns to the car he will be horrified to discover that someone has placed a single slug in the back of her head.
It worked for Robert, it just may work for your friend.