Mario Murillo, 28, was killed in a shooting at a residence at 2645 182nd Street north of Marshalltown in the early hours of April 19, 2024. Deputies responded about 1:45 a.m. after a welfare check and a report of blood outside; Murillo and Frances Tillie Gasca were found dead at the scene. Investigators recovered 14 cartridge cases and determined both victims suffered seven gunshot wounds.

An eyewitness described tensions after Ilias Julian Lasley arrived that night and said Lasley followed Murillo and Gasca outside, drew a handgun and began firing. Lasley was arrested the next day and charged with two counts of first-degree murder and later with two counts of dominion or control of a firearm by a felon. At trial in May 2026 Lasley testified he fired seven times but claimed he was aiming at another person. The jury acquitted him of Murillo’s murder but convicted him of second-degree murder in Gasca’s death and the firearm offenses.

No one was convicted for Murillo’s killing at the conclusion of the trial. If anyone knew Murillo or has information about who fired the shots that killed him, please come forward.