Continuity mistake: Dick Jones brags (admits?) to Robocop, "I had to kill Bob Morton because he made a mistake. Now, it's time to erase that mistake" while Robocop is crouched on the ground, not only looking away from him from across the room, but also Robocop's eyes are in a vertical position. In the playback, Jones is facing the camera as though it were videotaped or filmed in a studio. (01:10:50 - 01:35:10)
Visible crew/equipment: When Clarence Boddicker (Kurtwood Smith) is killed by Murphy (Peter Weller), Boddicker falls into the steel mill's water, blood spewing from his neck. Sharp eyes are required here to see that there is someone standing against the wall in the background... (01:32:40)
Revealing mistake: In the shot where Dick Jones is falling from the top of the OCP building, both of his arms appear to be about a foot longer than they should be. (01:36:30)
Revealing mistake: When ED-209 is being demonstrated for the first time and goes out of control, when the young executive is being shot, repeatedly, by ED-209, you can see packets of red paint strapped to his back, under his suit. (00:11:55)
Continuity mistake: When Murphy and Lewis are chasing the villains in the beginning, one of the bad guys shoots the windshield of the cop car, leaving a hole and messing up the glass. Not even a second later, the windshield is fine. (00:15:45)
Visible crew/equipment: Robocop tries to arrest Dick Jones but fails, and an ED-209 is brought in to destroy Robocop. During their fight scene, it fires a missile at Robocop, and you can see the guide wire that the missile flies along (slo-mo helps but it's not necessary). (01:09:00)
Continuity mistake: When Robocop is fighting Clarence Boddicker in the cocaine factory he throws Boddicker through a plate glass window. If you watch closely, you can see the window shatter about 1-2 seconds before he goes through it. (01:05:40)
Other mistake: After the one bad guy crashes into the giant vat of toxic waste, hardly any of the liquid from the container spills out for the first two shots. Then a few cuts later, almost all of it pours from the back of the truck. Judging by the size of the hole it left, more liquid should have been coming out around the truck, not just through it. (01:29:00)
Continuity mistake: When Clarence's car is flipped over at the steel mill, he gets out and starts firing at Lewis. Look at the windshield on Lewis's car. It's in perfect condition and all of a sudden 9 bullet holes appear in it. Clarence didn't even shoot his gun that many times. (01:30:45)
Continuity mistake: When Robocop shoots Dick Jones, the bullets go through Jones but not through the window which is right behind him. (01:35:55)
Continuity mistake: When Robocop's about to be run down by the van towards the end, he fires his traditional three-round burst at the windscreen, somehow producing nine bullet holes. (01:25:40)
Factual error: After Robocop stops the criminal from robbing the convenience store by bending his machine gun, the robber tries to run past him, only to get clotheslined by Robocop. The direction the robber flies after getting hit defies all physics. (00:35:15)
Visible crew/equipment: In the scene where all the OCP executives are listening to Dick Jones presenting ED-209, and while the "old man" starts talking about Delta City, watch when the camera moves along backwards to show the city model he's talking about and you can see reflected on several TV sets that are on the wall both the camera operator and another man behind him, perhaps the boom operator. (00:09:25)
Visible crew/equipment: When Clarence is racing away from Lewis near the end of the movie, the camera zooms in on Clarence driving the car and the camera men and camera truck are visible in the reflection of the car. (01:29:35)
Continuity mistake: When Robocop looks up his old address, his house number is the 500's on Primrose Street, but when he drives by the sign on his street it says he is in the 3000's section. (00:54:15)
Continuity mistake: When Clarence is talking with the other drug dealer in the warehouse, tempers flare and guns are drawn. The Asian gang member racks his shotgun (thus loading the weapon). Wouldn't he have kept it loaded? Anyway a few seconds later Robocop enters and the same Asian guy racks his shotgun again and no shell is ejected. (01:22:55)
Continuity mistake: When the executive is shot by Ed 209 near the beginning, we see bullet holes in his back, so they're obviously going through, but there's no damage to the windows behind him. (00:11:30)
Visible crew/equipment: When RoboCop is going to the mayors office to stop Miller you can see the camera shadow on the reporters, just after he gets out of the car, and on the police lieutenant when he asks him "What the hell do you think you are doing?". (00:36:58)
Continuity mistake: In the scene where Emil is robbing the Shell gas station, he puts the machine gun in his right hand. But when Robocop drives by and sees him from a distance, the guy has the gun in his left hand. When they cut back to the close-up again, it's in his right hand again. (00:49:35)
Continuity mistake: When Robocop is at OCP trying to save "the old man," Jones is wearing a black suit while he is holding him hostage. After he releases him (as Robocop shoots him) the suit is grey, then turns black again as he crashes through the window and falls to his death. (01:35:30)
Answer: Because he knew he was doing illegal activities. Robocop was said to be highly efficient at his job and Jones did not want to risk him out on the streets without the insurance of shutting him down if Robo came after him.
MasterOfAll