Q. What is it supposed to be on the show?

A. A college.

 
Q. Where is it supposed to be on the show?

A.  In New York City.

Q. When did we see it on the show?

A. In Episode 7 of Season One of Resurrection.

At Elsa's suggestion, Harrison visits the Collings College of Criminology, to look into a possible career in law enforcement.

Dexter is supposed to meet him for a tour of the school, but when his father is late to arrive, Harrison meets an attractive tour guide named Gigi, and starts the tour without him.


At the end of the tour, there is an opportunity to audit a class in forensics, which Harrison takes. But he is shocked when he enters the classroom and sees that the guest lecturer that day is none other than Detective Claudette Wallace, the same NYPD cop who considers Harrison a suspect in Ryan's murder.

During the class, Dexter finally arrives and joins Harrison, something that is noticed by the detective.

They listen to her lecture,  which focuses around the New York Ripper, including a display of very gory images of that serial killer's victims.



After the class, Det. Wallace approaches Harrison and Dexter, expressing her surprise that Harrison is interested in law enforcement.

Dexter can't resist showing her up by pointing out that the blood spatter images she has shown don't indicate the kind of weapon (a crowbar) that she had thought, but rather appear to show the results of a weapon with a handle and a point, such as a hook.

Afterward, Harrison flirts with Gigi, while Dexter visits the gift shop and ends up buying an overpriced “Proud Dad” hat.

 
The College of Criminology shows up again in Episode 8, where Harrison meets Gigi outside, in front of the school, and they arrange a date.

Q. What is it actually in real life?

A. A School of Law. 

Q. Where can I find it in real life?

A. This is actually the New York Law School, located at 185 W. Broadway, in the Tribeca neighborhood of New York.

That's at the southeast corner of Broadway & Leonard.
 

( If you look closely, you can see the number 185 on the glass windows in front of the college, during the exterior scenes.)

It appears that both the exteriors and the lobby interior scenes were shot at the law school.

But they faked it when it came to that large lecture hall where Harrison and Dexter listen to Detective Wallace speak. It looks like that lecture hall was actually at Fordham University's Gabelli School of Business, at 140 W 62nd St, New York, which is five miles north of the law school. (And ironically, only half a block away from Harrison's hotel.)

 
Resurrection filmed a number of different scenes in Tribeca this season. This law school is only a short distance from the two subway entrances seen on the show, as well as Mia's apartment (where she is arrested), the spot where Dexter drops off a passenger, and the steakhouse restaurant where Prater surprises Dexter  & Harrison.

But while creating the page, I got a little suspicious about that lecture hall. So I decided  to check, and ran a screencap of that lecture hall through Google Images, and it instantly turned up multiple matching  images identified as  Fordham University.
 
 
Here is a matching StreetView of New York Law School: 
 


Here is an aerial photo of the location.  And here is a map link.