1 and 2. Hearsay. No hard evidence.
3. If his buddies on the force don't 'lose' it.
4 and 5. That is assuming that Charlotte's and Emma's testimony will be believed and accepted without reservation.
We know what really went down, but proving it is a different matter. Can we prove that the knife was Carter's? Were his fingerprints on the knife put there after he was dead?
The MC killed an alleged psychopathic killer who'd allegedly murdered someone minutes before. Who then allegedly chased an 18 year old girl into an alley with the alleged intent to kill her. And now the MC, Charlotte, and Emma are conspiring to sully the good name of an honest and upstanding police officer who was brutally murdered by the MC. The DA is going to have a field day with this, especially if he plans to run for mayor. No legal system is perfect - horror stories about miscarriages of justice abound.
1&2 are not hearsay. You need to look up what that means. Eyewitness testimony confirms that 1&2 are true.
THEY WITNESSED IT.
Plus the MC's blood is on the knife.
Yeah as to 3 they could lose it, but if you'd bother to look at the prior discussion, Charlotte can bring a level of legal support and scrutiny that would make it VERY VERY career threatening to be CASUAL with the evidence. By the way losing that evidence loses the knife. Only the most corrupt judge would let a trial move forward where the assailant's weapon got "lost". Immediate mistrial. If the judge were to move forward anyway, the defense could move to a higher court holding the trial up pending that decision. So bottom line, no knife no trial. Heading off another transient, the defendant can have his own lab confirm the results. No knife no trial.
4&5 - Charlotte's and Emma's testimony only has to be credible, not accepted without reservation only credible. All the MC needs is a reasonable doubt.
Cell phones baby. If the GPS function wasn't disabled it's plus or minus maybe 50 feet. My cell reveals which room in my house it's in. If the GPS function is disabled, it's 50-100 yards. Carter's pursuit of Emma will be clear.
Yeah all brutal murderers go unarmed against an armed opponent. You should send me what you're smoking.
Charlotte can afford the finest legal defense in the world. Your conspiracy would put her daughter at risk. No DA, without regard for his or her political aspirations would take up the cudgel against the legal team she can afford with a millstone like Carter around their neck.
We can agree or disagree about the disparity of the law with regard to those of privilege. I happen to believe that disparity exists. The problem with your scenario is that Charlotte is among the privileged and, while the legal system corrupt or not might decide to target you or me for a frame, it would never target Charlotte, or her protector, with such a weak, messy, case.
The MC walks. Period. They won't lose the evidence, because they kill the case if they do. Multiple eyewitnesses, two of whom were not party to the fight testify to what happened. Phone records provide a timeline. Emma would have had to know were Carter was to set this up, and her records demonstrate that she could not have known.
This is the world of the 21st century. Unless you take painstaking care, the technology knows where you are pretty much 100% of the time. Can't fly. Won't fly. As I said in a previous comment, not all cops are corrupt, not all the lawyers in the DA's office are corrupt, Carter was going to slaughter an 18 year old girl. No way the lid stays on. The DA knows this. The cops know this. Carter was a murderous psychopath, they have better cops to protect.