Mental health screening data (Massachusetts Youth Screening Instrument version 2 [MAYSI-2]) and offense history were used to study levels of suicidal ideation in a sample of juvenile arrestees held in a large, urban detention center located in a predominately Hispanic Southwestern U.S. city. We used t-tests and multinomial logistic regression to examine the relationships with particular attention to temporal issues. Results indicated that offense history, the timing of arrests, and demographics did influence levels of suicide ideation. We discuss these findings, strengths and limitations, and directions for future research.