What “ineffective assistance of counsel” actually means
The short version
The Constitution guarantees not just a lawyer, but a minimally effective one. An ineffective-assistance claim (lawyers say “IAC”) argues the defense lawyer’s performance fell below professional standards AND that it likely changed the outcome. Both parts are required.
What tends to count
Examples courts have taken seriously: failing to investigate an alibi or an obvious witness, not consulting an expert where the case turned on science, giving wrong advice that led to a plea, failing to object to clearly inadmissible evidence, or missing a filing that forfeited an appeal.
What tends not to count
Strategy calls that simply didn’t work, a gruff manner, or losing a hard case are generally not enough. The question is professional competence and effect on the result — not likability, and not the verdict alone.
Where the record comes in
IAC claims are usually built from the record: what the lawyer did and didn’t do at each moment, what objections were or weren’t made, what the evidence actually showed. That is why a careful read of the transcripts matters more for this claim than for almost any other.
This page explains the law in general terms. It is not legal advice, and your loved one’s case may be different. A licensed attorney is the right person to apply any of this to a real case.