The only evidence was a letter and in it, to Mac's surprise, were photos of him and his deceased wife, Claire. "How did your attacker get those photos?" Stella asked him. "It's like he was there, and I couldn't see him. Get anything from the letter itself?" Mac said then asked Stella. "Got some trace, but no hits in CODIS. The DNA is a match, however, to a USAF veteran who lives here. Yet something doesn't make sense, according to the results from the tests, it says the donor is his grandson who isn't born yet," She told him. Mac looked at the results himself. "We're dealing with a time-traveler," He stated.