A/N: Yes, you find out the whys and wherefores in this chapter... but there's another twist or two to come yet! It's not over until chapter 27 ;)

"One of the better ones," agreed Leo. "Let's see what comes out of this interview."

"So…" said Nikki, looking from Leo to Harry and back again, as she sat upright on the sofa, "you're saying that this… Kirsty Green… was trying to con Uncle Matt into believing that she was his daughter, so that he'd make his will out to her?"

"Basically, yes," said Leo. "After taking on the persona of Christie Greenfield to make the story more believable. Ms. Green had a South African father, and so was aware that Greenfield and Groenveld were very similar names."

"Couldn't she just have changed her name? I mean, her own was pretty similar."

"Too easy to trace, if you happen to be suspicious. She needed to actually be that person, and that's why the real Christie Greenfield was murdered – though not until things had already started to go wrong. She murdered your Uncle, having thought that he'd named Christie Greenfield in his will as the beneficiary. He hadn't; he'd named his daughter as the beneficiary, and insisted on a DNA test. He was suspicious about the claim of her being his daughter, as well; and he had every cause to be."

"So she thought she'd stolen this girl's identity, would bump off the rich old guy and get the inheritance?"

"Yes, essentially."

"And Christie?"

Harry and Leo exchanged glances. Both had known that she would ask, and remembered their earlier conversation.

"You know what the real tragedy of this is, Harry?"

"No, what?"

"Look at the DNA profiles of the two victims."

"Oh Christ."

"Do you want to tell her, or shall I?"

Harry took her hands gently in his. "Kirsty needed her for the DNA test. Christie Greenfield was Matthias Groenveld's daughter."

Nikki looked up at him bleakly. "She was my cousin?" she whispered.

He nodded. "I'm sorry, Niks."

"I had a cousin… all these years, I had a cousin, and I never knew."

"I don't think she did, either," said Leo softly. "Nor your uncle."

Nikki gave a sniff. "What – what was she like?"

"A lot like you," said Harry quietly. "Tall, blonde, willowy. I have the facial reconstruction if you want to see it."

She nodded. "I'd like that."

He pulled it slowly out of a folder, and passed it over to her. "Remember the day I came in to see you, half-way through the morning?" She nodded. "I'd just finished working on that."

She gave him a watery smile, looking up from the photo. "Must have given you quite a scare."

"It gave us both a scare," muttered Leo.

"It did – even though I knew it couldn't actually be you," he said softly.

"Why did she try to kill me, then? And why did Uncle Matt's record go missing?"

"The record, because of the low testosterone count – she panicked that Christie might not have been his daughter after all. And it's possible that she thought that, somehow, she might use your DNA," said Leo. "And, quite simply, you knew too much."

"There's something else," added Harry. "When your uncle re-wrote his will, he left everything to his daughter."

"Yes, you said."

"With the codicil that, if his daughter didn't survive him… his beneficiary was to be his niece, Nicola Alexander. So without DNA proving her to be the daughter, everything would have gone to you, anyway - and she needed you out of the way so that she could contest the will."

Nikki fainted.