When showing the original murder in flashbacks, the killer is standing five feet or more away from the body when he shoots him. When Dennehy tells Dodd and the flashback is shown beneath the bridge, the gun is aimed only a few inches from the previous bullet hole. A gun fired that close would leave burn marks and gunpowder residue on the victim's head, which would be incongruous with the eyewitness accounts of the actual murder.
When Eddie fights with Chucky, he rubs the painted tears off Chucky's face with his right hand, leaving black marks on his index and middle fingers. A while later, while looking through a mug book at the cop shop, he looks at the marks on his fingers, which have now switched to his left hand.
The opportunity for cross-examination or re-direct examination of the witnesses is frequently glossed over. Not just that a character doesn't cross-examine such as the lack of cross of the prisoner at the end of the state's case, but most egregiously, the judge gives the district attorney no opportunity for re-direct of the eyewitness who testified she never took her eyes off the gun even though she obviously wanted to say more. No competent DA would fail to give her a chance to clarify her statements during the cross-examination.