Are the computer programs the law enforcement (police and FBI mostly) available to the general public?
Are you asking if the software the police use to create composite images is available to the general public?
Yes, that is precisely what I’m asking.. 
Police departments buy this software, so you can also. Some of it will be expensive, and municipal system providers may not want to deal with you. But there’s probably something equivalent at a reasonable price. And since there are so many retail apps available now, many municipalities will just be using the regular low cost off the shelf software already. I’m guessing you don’t actually care if it’s official police department software anyway.
ETA: Simply googling ‘composite image software’ turns up lots of hits.
Didn’t care about “officialness”. 
Thanx for not doing the “Google is your friend” meme.
The most common police composite software I’m aware of is Identi-Kit. If you don’t want to purchase premium professional software intended for law enforcement use and just want to have fun and screw around, there’s one called “flashface” that’s pretty neat, or at least used to be, its a paid app purchased for a small fee now and I haven’t seen it in a while.
Thanx pravnik. If it still exists, it’s what I’m looking for.