In my defense, I was watching the episode with headphones on and on my laptop.
Omar Valez, a homeless man, was stabbed and killed and then dumped in a park.
That question sets the coroner off.

Credit: CBS
On the other side of a creek is a piece of police tape and the marks of police-issued footwear.
That seems like more than a coincidence.
This time she insists she actually needs Joans help.
With the Red Shadow as the prime suspect, the NYPD questions their lawyer.
He insists that they had nothing to do with the explosion, though.
Who knows, right?
The questioning is ultimately a useless endeavor, but Sherlock finds something elsewhere.
Sure enough, the Jane Doe was known as Janet of the Apes to her roller derby buddies.
When they go to question the other players, they dont find much out.
Janet had only joined the team a few weeks back.
Toby says hes innocent but does say that Dylan was Janets on-and-off boyfriend and that hes prone to violence.
That leads Sherlock online, where he determines that the suddenly appearing jack was probably a hidden camera.
Before they head back to Janets apartment, Joan confronts Cortes.
You know, vigilante justice and all that.
They use that footage to obtain a search warrant and go to look through Tobys stuff.
NEXT: Like father like son
Still, Toby insists he didnt kill her.
Sure, he was obsessed with her, but he would never hurt her.
His journals and the creepy photos were just his way of working through his issues.
Thats when everything comes together for Sherlock.
He believes that Neil, Tobys father, found the journal and confronted his son about it.
He got him help, but it wasnt working.
And what about Nicole, who died from the bomb blast in the morgue?
With Neil pinned for the murders, all thats left is for Joan to once again confront Cortes.