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MAJOR CASE (#CI8022)
EPISODE PREMIERE: July 26, 2009
The detectives lean hard on Justin, but it turns out he has a unique alibi. Cops from Narcotics tailed Justin and another dealer the night of Grace's death. They spent the evening playing video games.
Confused by Henry's findings, Nichols approaches M.E. Rodgers for an explanation. She insists she went over the body herself, and has done so again recently, and there are no viable tissue samples. When he learns that Henry's mother lived across the street from Grace he approaches Ross with his suspicions about Henry. Ross dismisses the theory and tells him to check out Nate.
Nichols orchestrates an elaborate set up during a visit to Henry at the lab. While they talk, Henry sees a woman nearby wearing Grace's clothing and looking just like Grace. Nichols knows in that moment that Henry killed Grace, and Henry knows that Nichols knows.
Eames gets a report on some of Grace's clothing taken from her home: they have male semen on them. The detectives arrest Nate and bring him in for questioning.
Meanwhile, Rodgers approaches Henry for a favor. She explains that Nichols ordered expensive MRI imaging tests on Grace, which turned up a single hair from inside her body. It's likely the killer's. She hopes he will take a look at the hair. He will.
The detectives interrogate Nate, but are getting nowhere. Henry stops by to get a reference sample hair from the suspect, Nate. He takes a piece of Nate's hair to compare to the one given to him by Rodgers.
Henry types up his report and returns to the squad room with the news: the hairs are a DNA match. Nate is Grace's killer, he tells them.
In the final scene of the episode, Nichols tells Henry that the hair given to him by Rodgers was his own hair (Nichols'). Nichols puts the squeeze on Henry and the brilliant forensic scientist is shown to be a tortured, sexually repressed pedophile.
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