During the trial, McCoy holds up an evidence bag containing a knife. The entire knife is visible indicating that the evidence bag label is on the backside of the bag. On the reverse angle - as McCoy is showing the knife to the witness, the entire knife is still visible, indicating the label is now on the front.
When Briscoe finds out his daughter was caught stealing prescription drugs from a hospital pharmacy and selling them on the street he comments that the amount she stole is "B felony weight, she could get away with probation." That is actually incorrect, a conviction on a non-violent class B felony, in this case criminal possession of a controlled substance in the third degree, actually carries a mandatory minimum sentence of 1-3 years in prison. However since she was also selling these drugs, that fact combined with the fact that they are all schedule II controlled substances and the large amount she was selling, means she would also likely get charged with criminal sale of a controlled substance in the second degree, which is a class A-II felony. The minimum sentence for that is 3-8 1/3 years in prison and the maximum can be up to life in prison, though if this is her first offense she'll likely get the minimum. So with the criminal possession three and criminal sale two charges she'd be looking at a combined minimum sentence of 4-11 1/3 years in prison.
When the mail carrier describes the girl on the bus to Briscoe and Curtis, she says she was a white girl with a ring in her nose and a barbed wire tattoo on her neck. In the next scene, the detectives are asking a DJ about the same girl, describing her as having a blue streak in her hair and having an Eyebrow ring, neither of which the mail carrier mentioned in her description.