Yes, breath or blood test results can sometimes be suppressed if the defense can show constitutional or procedural violations that render the evidence unreliable or inadmissible. Suppression motions target issues such as lack of probable cause, failure to follow proper testing protocols, or chain-of-custody defects. Successful suppression can limit the prosecution’s ability to rely on the chemical evidence and may alter plea discussions or trial strategies. Courts evaluate the specific facts and documentation in each case to determine whether suppression is appropriate under Mississippi law. Each suppression effort depends on the available records and the particular facts of the arrest and testing. In Ellisville cases, common grounds include missing calibration logs, inadequate operator documentation, or procedural deviations from manufacturer or lab guidelines. The defense must present compelling evidence of such deficiencies in filings or at hearings to persuade the court to exclude test results from evidence.