Devon Rideout was 24 and serving as a Navy corpsman at Camp Pendleton when she was shot and killed on July 20, 2018, in Oceanside, California. She was ambushed and shot multiple times by her upstairs neighbor, Eduardo Arriola, as she walked her dog near their apartment complex on Los Arbolitos Boulevard. Arriola told bystanders and police that she was a trespasser, but evidence — including Rideout’s name scrawled on Arriola’s car radiator tank along with other names and the phrase R.I.P. — suggested a planned attack and investigators charged him with first-degree murder and a special circumstance allegation of lying in wait.

Arriola, a former Marine discharged for desertion who had been diagnosed with schizophrenia, went to trial where his defense argued his severe mental illness prevented intent. The jury found him guilty and he received life without parole; an appellate challenge about competency to stand trial was rejected. Afterward Rideout’s mother, Leslie Woods, sued the federal government and the California Department of Justice, alleging failures to submit information that would have barred Arriola from buying the firearm. Those suits were settled for a combined $10.5 million, underscoring claims the killing was preventable.

Did anyone in Oceanside know Devon or witness the events around July 20, 2018, who can add details about her or that night?