A woman name Jessica was been killed and the weapon used was a wine glass.
She was one of Mac's staff working on DNA and autopsy stuff.
Thus, Mac kind of depressed cause he didn't get to know his staff better and he had this kind of feeling that young lady helped him alot with previous cases his office working on.
and apparently the case was exactly the same with a 1957 case famously known as Lana case.
2012
1957
Both of the victims shared the same kind of similarities in terms of physical appearances.
They had this pair of eyes where one of it was brown in colour and too bad I couldn't remember it's scientific name.
The detective who was in charge for the 1957 case or Lana's case came to Mac's office.
He told Mac altough it has been 55 years and he did not manage to find the murderer, he knew he could contribute something this time.
Back to 55 years ago, the detective was only 22 and the technology they had in lab wasn't that advanced.
He gave Mac a theory of "What colour of lipstick did the victim wear?" cause he knew the fact of both cases were almost the same.
At the end of the episode, it was actually Jessica's besftriend name Kim who killed her.
There were 3 people who managed to pass the examination but the promotion for next position in the lab were only two.
Kim had this kind of jealousy towards Lana about everything.
She told Mac during her confession "I never knew it could be this easy to eliminate Jessica."
Mac looked her in the eyes and told her "It could be easy for you to kill someone. But it must be harder to live in the guilty. I promise you."
That is so true.
I mean how could you kill your own bestfriend and the person you see them everyday in the office?
It just doesn't make sense at all to kill someone just because they are prettier than you.
Kim