There have always been mixed feelings about America's justice system. Some people put complete faith and trust that this system will not fail when it comes to incarcerating the true criminals. Other individuals say America's justice system is corrupt, and they didn't stop there once news broke out about Steven Avery's case back in 1985.

This Manitowoc County man was wrongfully convicted of a sexual assault crime he did not commit, but he still served 18 years in prison for it. He spent days working on cars, and at nights sat alone in his cell with nothing but his thoughts. Despite having alibis the day this crime was committed, and evidence for a different possible suspect, Avery wasn't able to fight his conviction until 2003. When the Wisconsin Innocence Project took on Steven's case, they resent the evidence from the sexual assault to a lab for DNA testing. They were able to get the assailant's profile, ran it through the criminal database, and linked it to a man named Gregory Allen, the other suspect whom the Manitowoc Police Department chose to ignore even though they were given prior evidence.

Due to this mishap, the Wisconsin Attorney General ordered the Division of Criminal Investigation to take a look at how Steven Avery's case was handled by the Manitowoc Police Department. The two DCI agents assigned to this case found that the Manitowoc Police Department didn't conduct a proper investigation of the sexual assault in 1985, and instead set their view on Avery as the assailant despite having evidence to suggest otherwise. After the agents submitted their work, the Attorney General's Office concluded there was no wrongdoing in the way the police department handled Avery's case.

Steven Avery took matters into his own hands and filed a lawsuit against the police department for his inaccurate conviction, which cost him 18 years of his freedom. He never expected to be accused of Teresa Halbach's murder just two years later.

Halbach was a photographer and worked consistently with Autotrader and took pictures of vehicles for the company. She was called in missing when her family couldn't get into contact with her after her last stop for the evening at Steven Avery's Auto Salvage. Eventually her car was found on Avery's property, with a blood stain by the ignition. A different police department took charge of the case instead of Manitowoc Police Department in order to avoid conflict of interest. The Manitowoc Police Department had specific orders to stay out of the case, however when there was a warrant to search the Avery residence, two Manitowoc officers assisted. One of which found Teresa Halbach's car key in plain sight on Steven's bedroom floor, although a Calumet police officer under oath stated this spot was searched previously, and the key had not been there the first time. The Avery family was also told they could not stay on their property while the search was going on. On top of that, the key only had Steven Avery's DNA on it. For a woman who drove this same car for years, it would make sense that her DNA should have also been on the key. Pete Baetz, a lieutenant-deputy sheriff in Illinois, stated that this key must have been wiped clean and Steven's DNA must have been put on the key; it is a highly possible scenario and makes a lot of sense.

There are other incidents where the evidence against Steven Avery didn't add up correctly. Yes, Teresa Halbach's car was found in Steven's salvage yard, but that's not to say he was the one who put it there. As for the blood stain by the ignition, a later episode in the series shows that the Manitowoc Police Department had a liquid sample of Steven Avery's blood from the 1985 sexual assault case. This evidence was clearly tampered with because the evidence container's seal was broken. Inside was a vial of Avery's blood, which had a small hole poked through the lid, about the size of a hypodermic needle. Only the Manitowoc Police Department had access to this evidence.

It seemed as though any time Steven's innocence was a possibility, the police found more evidence against him. Through video footage of some interviews with relatives, friend, or anyone involved in the case for that matter, the interrogators were too suggestive of what happened that night. When questioning Steven's only alibi, his sixteen-year-old nephew, Brendan Dassey, the police used unethical means of getting a confession from Dassey. They told him it was OK with his mother that he speak to the police alone, although he is a minor and legally his mother should have been there. The police failed to inform Dassey's mother of this interview, and as the mother states, her son is a slow learner and the police convinced him of what they wanted him to say. Throughout the interview, the police shaped Brendan's story and kept repeating that they already knew what happened and Brendan just needed to confirm it. It is also clear that Brendan's statements were said in a way that he is almost searching for the right answer that the police were looking for. Not only did the police keep the interview from Dassey's mother, but they question him several times after that incident, without a lawyer present.

Later in the documentary series, the audience finds evidence that Teresa's ex-boyfriend saw her the day she went missing. After she was reported missing, the ex-boyfriend tapped into her phone account and deleted messages left on her phone. In court, he also stated that he was never treated as a suspect.

More evidence shows that Sergeant Andrew Colborn called into dispatch and read off the same license plate two days before Teresa Halbach's vehicle was reported found. There was speculation regarding how Sergeant Colborn also named Teresa's vehicle make and model, if he had not been looking at it directly in front of him.

"Making A Murderer" causes people to question the justice system, but with good reason. Past incidents have shown that police departments can in fact wrongly convict someone of a crime they had never committed. This documentary series lays out the facts for the audience to decide. However with all this evidence pointing in Steven Avery's favor, it's difficult to understand how he and Brendan Dassey are still in jail today. There's a possibility that the audience is not given all the information, but it is also possible the Manitowoc Police Department doesn't want to admit a second wrongful charge against the same man after being made a mockery the first time. Despite the Avery's attempts to have this case taken to a higher level of justice in the court system, the ongoing investigation and trial remain in the small town of Manitowoc, Wisconsin .