A criminal case is a sequence of decision points, each with its own standard of proof, its own deadline, and its own irreversibility. This guide walks the entire sequence for defendants, families, and the lawyers who advise them: investigation and arrest, the charging decision, the first appearance and pretrial release, discovery and the Brady obligation, suppression motions, the plea negotiation where more than nine in ten cases end, trial, sentencing, and appeal. It explains the standards that actually govern each stage — probable cause, preponderance, clear and convincing, and beyond a reasonable doubt — and why moving between them changes what evidence matters. Substantial attention is given to plea bargaining as the system's real engine, including the constitutional duties that attach to plea advice under Padilla, Frye, and Lafler, and the Rule 11 colloquy that makes a plea nearly impossible to undo. The sentencing part covers the advisory guideline system after Booker, the jury-trial limits from Apprendi through Alleyne, mandatory minimums, fines and fees, and the Excessive Fines Clause after Timbs. It closes with appeals, collateral attack, and the practical map of what relief remains after the direct appeal is over.