Time traveling executioners with a black cyborg girl?

[BTM]

So, I saw this film a long time ago and it was about three time travelers who come back to the past to kill several people for crimes they're guilty of in the future.  One's the leader, and the most gun ho about fulfilling his duties, another is a bespectacled bureaucrat who's really squeamish about the whole thing and the third is a black female cyborg who I don't think ever says anything.

One of their intended victims is a young man who wasn't, as yet, committed any horrible crimes, so a tough cop decides to protect him (which is interesting because up until now he'd been pretty straight forward about going Charles Bronson on evil doers regardless of their age.)

Also, I THINK this scene is from the same movie, but I'm not sure... 

These two cops are chasing a young teen who's just held up a store, they get separated when one cop finds the kid and orders him to throw down his gun.  He does, and laughs at the cop, insulting him and saying something like, "You stupid cop! They can't do anything to me!  I'm a minor and the gun was FAKE!" 

The cop says, "Oh really?  Well, let me see that, will you?" 

When the kid bends down to pick up the gun, the guys partner appears and the cop yells, "Stop!" and then shoot the teen.

Like I said, these MIGHT be from the same film, but I'm not sure/

[pori]

Past Perfect (1996)

[Archivist]

It sure looks like Past Perfect. Damn, you're good. Are you some kind of omniscient movie database cyborg sent from the future?

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[Rev. Powell]

It sure looks like Past Perfect. Damn, you're good. Are you some kind of omniscient movie database cyborg sent from the future?

Error 404 (Not Found)!!1

I know pori from irememberthismovie.com.  He/she is very good and very thorough. And doesn't mind answering questions that are 10 years old.

[chefzombie]

welcome the main house of our asylum, pori! i'm chef, pleasure to meet you! * you can call me barri, if you like*

[pori]

Hi! Nice to meet you too 

I don't watch old movies much. But I'm looking at movie questions on several sites : )

[chefzombie]

i need to find the question about  a movie my husband saw as a child that first brought me to our family here at BMDO, i'd bet you could solve it after 12+years.