Final answer:
The role of the suspect's attorney at a lineup is to protect the rights of everyone appearing at the lineup and ensure fairness.
Step-by-step explanation:
The role of the suspect's attorney at a lineup is to protect the rights of everyone appearing at the lineup. The attorney's job is to ensure that the lineup is conducted fairly and that the rights of the suspect and other participants are respected. They may also participate in the lineup by providing guidance and advice to the suspect.