A useful timeline begins before the assault. Keep letters, messages and personal notes that you lawfully hold. Record the threat's wording and date, who received the warning, any handover and the prison's response. For the assault, note the sequence, location, time, witnesses and any known earlier incidents involving the alleged assailant. Distinguish what you personally observed from information received from someone else.
For a lasting injury, medical findings, treatment and a doctor's assessment of continuing effects are important. Record which symptoms remain and how they affect daily life or work. Bills, receipts and records of absences may help explain the extent of the loss. Whether a particular item is legally recoverable, and which public entity is liable, must be assessed in the individual case.
Internal notes, reports or records may matter to the prison's knowledge at the time. Whether the injured person or family members can access them depends on the applicable procedures. Ask a lawyer to check possible access and time limits early. Do not remove or alter prison records.