The siblings of Joshua Yahn, who is described as a “crazy Dallas Ice Sniper,” were involved in a shooting incident that resulted in one immigrant detainee’s death and two others being injured on Wednesday. Notably, they also have a troubling criminal history, mirroring some aspects of their brother’s record.
Kioko Jahn, 27, has faced three arrests in Collin County and is thought to have had multiple run-ins with the law in Texas since 2017, according to public records.
She was first arrested on April 4, 2019, charged with misdemeanor assault. After about seven months, she seemingly accepted a plea deal in exchange for an unspecified probation period, as indicated by court documents.
On March 4, 2022, she was arrested again for possession of marijuana, although her case was dismissed in August 2023.
Collin County Court records reveal that Joshua’s brother was taken into custody the day after Kioko’s marijuana arrest but was soon released on bond.
The local police department hasn’t provided an immediate response regarding the recent shooting incident.
Authorities reported that Joshua Yahn fired multiple shots from a rooftop targeting a bus filled with immigrants escorted by federal agents at the ICE field office in Dallas.
This attack claimed the life of one detainee and left two others injured, including individuals from Mexico, as confirmed by the Mexican government.
After the shooting, the suspected gunman, who had previously registered as an independent voter in the 2020 Democratic primary, was found dead from a self-inflicted gunshot wound.
Near his body, investigators found the phrase “anti-ice” written with ammunition clips.
They also discovered a blue Toyota Corolla believed to belong to Joshua, which had a taped map indicating areas in the US where radioactive clouds intersected due to tests conducted in Nevada during the 1950s and 1960s.
This violent episode is being treated as a targeted attack against federal employees.
Joe Rothlock, a special agent with the FBI in Dallas, stated during a press conference, “We recognize that this incident is an act of targeted violence.” He lamented that this event adds to a troubling trend of similar acts in North Texas, referencing a coordinated attack on an immigration center in Alvarado earlier in July.
This incident marks the third targeted attack on ICE or customs border security agents since July, escalating the discourse among political figures regarding government agencies.

