7 Thelma Todd, an American actress, died on 16 December 1935. She was found dead in her car. The reason for her death was determined to be carbon monoxide poisoning, but the exact circumstances couldn’t be determined, and the case was closed as “accidental with possible suicidal tendencies.” It was never determined that her death was accidental, suicide, or murder.

Thelma Alice Todd was an American actress who was featured in multiple movies and was best remembered for her comedic roles. She died at the age of 29 on 16 December 1935 inside her parked car in her garage.

Her death was determined to be because of carbon monoxide poisoning, but the exact circumstances of the death were not determined. A grand jury determined that Thelma Todd was murdered, but there was no evidence of foul play.

The case consisted of many theories and speculations, but it was officially closed by the homicide bureau who declared the death was “accidental with possible suicidal tendencies.” We will never know whether Thelma Todd’s death was accidental, suicide, or murder. (1, 2)

8 Adrian Lamo, a computer hacker was found dead on 14 March 2018 in the guest bedroom of a couple’s home with whom he had been living. After months of investigation, the cause of his death was not identified, but theories suggested that his death had something to do with his involvement in Chelsea Manning and Julian Assange criminal cases.

Adrian Lamo was a computer hacker who died at the age of 37 on 14 March 2018. He gained media attention after he broke into several high-profile computer networks including Yahoo and Microsoft.

He leaked hundreds of sensitive U.S. government documents. He died on a pile of sheets in the guest bedroom of a couple’s home with whom he had been living.

After months of investigating, the cause of his death has not been identified. Many theories came into circulation. One was that his death was related to his involvement in the criminal cases against Chelsea Manning and Julian Assange.

However, the evidence suggests that he died due to drug abuse, as various pills were found in his home which can cause severe health problems when combined with kratom, a drug he was addicted to. His death is still an unsolved mystery. (1, 2)

9 Alberto Nisman, an Argentine federal prosecutor, was found dead on 18 January 2015 with a single gunshot wound to his head. He was investigating the AMIA bombing, and openly accused the Argentine president of covering up suspects. Theories suggested that he committed suicide, but his friends and family denied it. The case is still under investigation.

Alberto Nisman, an Argentina federal prosecutor, was the chief investigator of the 1994 AMIA bombings, which were the deadliest terror attack in Argentina. He was found dead in his home with a single gunshot mark to his head on 18 January 2015.

He openly accused President Cristina Kirchner and other high officials of covering up the suspects of the attack for foreign policy reasons. He was about to present his evidence against the high-ranking officials, including the President, to Congress the next day.

However, Nisman’s death was ruled as suicide by a group of forensic experts, but his friends and family denied it. They say that Nisman didn’t seem depressed at all. Instead, he was eagerly looking forward to his meeting with Congress. The investigation of Alberto Nisman is still an open case. (1, 2)

10 Yves Godard, a French doctor, disappeared with his two children in a sailing boat in September 1999. In 2000, a skull fragment was found which was from his daughter, and some of his bone fragments were also found later. There was no trace of his wife and son. In 2012, the case was closed and prosecutors ruled out accidental death and believe that Godard probably murdered his family.

Yves Godard was a French doctor who disappeared with his two children in September 2000. He departed with his two children on a sailing boat and never came back. As the mystery unfolded, clues were discovered. Traces of blood were found in the family home.

In 2000, a skull fragment belonging to one of Godard’s children, probably his daughter, was discovered, and six years later some bone fragments of Dr. Godard himself were discovered. Over the next few years, many other objects were found like lifeboats, identity papers, credit cards, and many other things on the north coast of Brittany.

Prosecutors ruled out accidental death and believed that Dr. Godard murdered his family and committed suicide at sea, but they are uncertain about this theory. The case was closed without any charges in 2012. (1, 2)

11 Joan Robinson Hill died in 1969, but her autopsy examinations failed to determine the cause of her death. At first, it was considered influenza, but later her husband John hill was charged with murder by omission. During Hill’s second trial, he was gunned down by a home intruder in 1972. Later. the suspected gunman was also killed in a police shootout.

Joan Robinson Hill was a Texas socialite who died on March 19, 1969. In her autopsy examination report, no cause of her death could be determined.

The reason for her death was considered to be influenza at first, but her father Ash Robinson repeatedly accused her husband John Hill of poisoning her daughter. John Hill was charged with murder by omission by the State of Texas.

In February 1971, the first trial was held concerning Joan Robinson Hill’s murder case but resulted in a mistrial. As the second trial was approaching in 1972, her husband, John Hill, was gunned down by a home intruder.

Bobby Wayne Vandiver, who was the suspect in the John Hill murder case, was killed in a police shootout. Two other alleged accomplices, Marcia McKittrick and Lilla Paulus, were later convicted. (1, 2)

12 Lal Bahadur Shastri, an Indian statesman, died on 11 January 1966 after he visited Tashkent after the Indo-Pak War to sign a peace agreement with the Pakistani president. Just a few hours after the meeting, he was found dead. Reports say he suffered cardiac arrest, but the circumstances seem suspicious.

Lal Bahadur Shastri was an Indian statesman who also served as the second prime minister of India. He was a big contributor to the independence of India and also towards the betterment of India after its independence. On 10 January 1966, after the Indo-Pak War in 1965, he visited Tashkent to meet Pakistani President Ayub Khan and sign a peace agreement.

He died mysteriously on 11 January 1966 just hours after the meeting with the Pakistani president. The report states that Shastriji suffered cardiac arrest, but this seems extremely suspicious because his doctor said that he was in perfect health with no signs of heart problems.

His family noticed white and blue spots along with some cut marks on his body. In 1977, two witnesses who were Shastriji servants were scheduled to appear in front of the parliamentary body, but both of them died in accidents. The mystery of Lal Bahadur Shastri is still unsolved. (1, 2)