Eiken Elam Saimon is a man who was convicted by Missouri of three counts of first-degree murder for opening fire on a church congregation in Neosho, Missouri in 2007.

Saimon is a native of Pohnpei and a national of the Federated States of Micronesia; he was living in Neosho at the time of the shootings. Witnesses reported that on 12 August 2007, Saimon entered the First Congregational Church in Neosho during Sunday services. There were over 50 people attending the services, most of them from Neosho's Micronesian community. Police said that Saimon carried two small-caliber handguns and a 9-millimeter semi-automatic pistol. After asking the children and some members of his own family to leave the room, Saimon began shooting at the other people in the church. Three people were killed: the pastor of the church and two deacons. Police suspected that he was specifically targeting church leaders.

Saimon was arrested after approximately ten minutes of negotiations with the police. After his arrest, police announced that Saimon was also being charged with the sexual assault of a 14-year-old relative. The connection between the alleged sexual assault and the shooting incident was unclear.

A preliminary hearing was held on 18 September 2007, where Saimon pleaded not guilty to three counts of murder, four counts of assault, one count of felonious restraint, and one count of armed criminal action. In September 2008, Saimon's trial was scheduled to begin in July 2009. Before the start of the trial, Saimon reversed his plea and pleaded guilty on March 29, 2009 to three counts of first-degree murder and four counts of first-degree assault. He also pleaded guilty to charges of statutory rape and statutory sodomy for a sexual assault on a 14-year-old girl two days before the August 12, 2007, shootings. In a deal with prosecutors, he avoided the death penalty, but was sentenced to three consecutive life sentences without the possibility of parole, along with four 30-year sentences for the assaults and two seven-year sentences for the sex offenses. Saimon is imprisoned in Crossroads Correctional Center.