6th Amd right to counsel: Offense-specific --> triggered by initiation of formal adversarial process (formal charges, indictment, arraignment, or preliminary hearing) and carries to all critical stages (deliberate elicitation of statements, physical lineup, prelim hearing, and trial) of adversarial process.
Any statement obtained by police from D related to crime he is formally charged w/ is inadmissible unless
he executed a knowing and voluntary waiver -- but D does not have to specifically invoke 6th in order for it to apply; it is self-executing
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Confidential jail informant after D invokes 5th and 6th rights: ok in terms of Miranda (no cop interrogation) but NOT for 6th --> per se right to not be questioned by an agent w/o presence of counsel after invoking this right