Jurijus Kadamovas and Iouri Mikhel

Both men are currently on federal death row awaiting execution and are imprisoned at USP Terre Haute. The Ninth Circuit Court of Appeals upheld their death sentences in 2018.

Natalya Solovyeva, the girlfriend of Kadamovas, pleaded guilty to conspiracy to take hostages resulting in death and two counts of hostage taking resulting in death. She had lured one of the victims to a bar, where he was abducted and forced to contact another man, who also became a victim. Solovyeva also received a substantial assistance specification in exchange for her cooperation. Prosecutors sought an 11-year sentence for Solovyeva, citing her assistance, but she was sentenced to 15 years in prison, with the judge saying that she had been promised a new BMW if she participated in the kidnappings and that two men would "probably be alive today" had she not taken part. During the hearing, apologized in Russian, saying through a translator "I would like to say over and over again how sorry I am for what I did. I am sorry for all the victims. I know I made a terrible choice I will regret for all my life." Prosecutor Susan DeWitt said that Solovyeva had been controlled and manipulated by Kadamovas. The two also had a child together. Ruven Umansky, the father of victim Alexander Umansky, said he didn't believe Solovyeva had been entirely honest. "She did until the end help abduct and kill people," he said. Soloyeva was released from prison on July 8, 2015.

Aleksejus Markovskis, who stood guard over two of the victims during their abductions, pleaded guilty to counts of conspiracy to take hostages resulting in death. In exchange for his cooperation, he was granted a substantial assistance specification. Markovskis was sentenced to 15 years in prison. After Soloyeva received a 15-year sentence, Markovskis had his sentence reduced to 12.5 years, since prosecutors said he was less culpable than her. He was released from prison in 2012.

On March 12, 2007, Kadamovas and Mikhel were sentenced to death. Four others were sentenced for participating in the plot, receiving sentences ranging from 11 years to life imprisonment.

The guilty phase of this trial began in July 2006 and spanned five months. On January 17, 2007, the jury found both defendants guilty on all counts. On March 12, 2007, both men were sentenced to death. U.S. District Judge Dickran Tevrizian formally sentenced both men and called the murders brutal, adding that "the methods in which the individuals were killed, the perpetrators showed no mercy". The two were also ordered to forfeit over $1 million.

In January 2002, Kadamovas and Mikhel decided to target Safiev again, as he had returned from a trip and was back in Los Angeles. They planned to get him through his business partner, 29-year-old Nick Kharabadze. Kharabadze was contacted and asked to meet at a private club, which was actually the aquarium store owned by Kadamovas and Mikhel. Kharabadze arrived at the store and was then handcuffed to a chair by Mikhel. He was ordered to call Safiev and to convince him to come to the store. Safiev arrived and was taken prisoner. Both hostages were then taken to Kadamovas' house, where they made Safiev call another business partner of his and plead with him to transfer $940,000 to a foreign account. Kharabadze and Safiev remained imprisoned in the house for four days. While held captive, Kadamovas recorded Safiev's voice, planning to use the recordings to extort more money in the future. Mikhel eventually confirmed receipt of the $940,000, and then decided to kill the two men. They forced both the victims to drink vodka and then took them to the reservoir in two cars. Mikhel killed Kharabadze at the reservoir by placing a plastic bag over his head and tightening a plastic tie around his throat. A weight was then tied to Kharabadze's body and he was thrown off a bridge into the reservoir. The same thing then happened to Safiev.

In October 2001, Kadamovas and Mikhel came up with a plan to lure and kidnap 58-year-old Meyer Muscatel, a local real-estate developer. Mikhel posed as a businessman interested in buying real estate. Muscatel was lured to Mikhel's house in Encino where Kadamovas and another accomplice were waiting. Muscatel was bound, handcuffed, duct-taped and pistol whipped in the head. His wallet and credit cards were taken and he was then questioned about his finances. Kadamovas and Mikhel attempted to withdraw money from his account but the bank account was frozen. Muscatel was then injected with diphenhydramine and pinned to the ground, where Mikhel placed a plastic bag over his head and suffocated him to death. Muscatel's body was then taken in Kadamovas’ van to the New Melones Lake. The pair then tossed his body off Parrotts Ferry Bridge into the reservoir.

Their next target was 37-year-old George Safiev, a wealthy Russian businessman who lived in Beverly Hills. In December 2001, the pair abducted Safiev's financial advisor, 39-year-old Rita Pekler, who was pregnant at the time. Kadamovas had contacted Pekler pretending to be interested in real estate transaction. She was lured to his Sherman Oaks home where Mikhel, armed with a handgun and stun gun, was waiting with two other accomplices. When Pekler arrived, Mikhel restrained her and told her to contact Safiev. She made contact but Safiev told her he was too busy to meet. Pekler was then injected with diphenhydramine and strangled to death. Her body was also thrown off the Parrotts Ferry Bridge into the reservoir.

The third victim was 35-year-old Alexander Umansky, who owned an automobile shop. In December 2001, Mikhel posed as a customer and pretended to need audio equipment installed in several cars. Umansky was lured to the home of Kadamovas where he was ambushed. Kadamovas sat him on a chair and handcuffed him. He had his keys, telephone, and wallet taken from him and was then questioned about his finances. Umansky was held captive in the house for three days, during which he was forced to call his brother and beg for money to secure his release. Kadamovas and Mikhel also sent the Umansky family a ransom note demanding nearly $235,000. The family contacted the FBI, where they were advised to pay a part of the ransom. They later received a call in which other family members were threatened, forcing them to pay the rest of the money. The money was transferred to an account in the United Arab Emirates. The calls then stopped.

Jurijus Kadamovas (born October 22, 1966) and Iouri Gherman Mikhel (born April 9, 1965) are Soviet-born American serial killers who immigrated to the United States from Lithuania and Russia, respectively. They are currently on federal death row for five kidnappings and murders. The kidnappings occurred over a four-month period beginning in late 2001, in which the kidnappers demanded ransom.

Jurijus Kadamovas was born on October 22, 1966, in Lithuania, and Iouri Gherman Mikhel was born on April 9, 1965, in Leningrad, USSR. Both men were foreign nationals who emigrated to the United States and lived in Los Angeles, California. They each owned a house in San Fernando Valley, with Kadamovas living in Sherman Oaks and Mikhel living in Encino. The men owned a joint business called Designed Water World, which was a fish aquarium store located on Ventura Boulevard.