The Springfield, Missouri police department lost one officer killed (Christopher Walsh, above) and one wounded to a mass shooter. Three local citizens were killed and one wounded.
They've named Joaquin S. Roman as the shooter [5 dead, including officer, gunman in shooting at Missouri gas station, ABC7, March 16, 2020].
UPDATE: The suspect from last night's shooting has been identified as Joaquin Roman (31) from Springfield.— Springfield PD (@SGFPolice) March 16, 2020
3 citizens were killed and 1 remains in critical condition. Ofc. Chris Walsh was fatally wounded and Ofc. Josiah Overton remains hospitalized. https://t.co/vBGLh1GPxY pic.twitter.com/SdPXdSRHdv
Assuming it's the same one, this guy was not a field hand from Chiapas, but a techie with a lot of education in California, not all of it paid for by the taxpayer. The high school listed is a boarding school, the kind that trains students in rifle-shooting.
It also says he claimed to be bilingual in English and Spanish, so perhaps he was some kind of immigrant. You're likely to hear a lot about "where he got his gun" or what his motivation was, but less about why this guy was in the country.