Fremantle have been asked to provide their own video footage to help the WAFL investigate how star midfielder Anthony Morabito was felled in Peel's match at Fremantle Oval on Sunday.
The Dockers player was taken from the ground on a stretcher in the final minutes of the match as his WAFL team upset South Fremantle.
Morabito was later cleared of any facial injury but may not be able to make his long-awaited Fremantle comeback this week if he is found to be suffering concussion.
WAFL operations manager Cameron Knapton last night asked the Dockers to supply any footage shot from their dedicated camera behind the goals at Fremantle Oval.
The WAFL's match-day video did not show the incident in which Morabito was felled during a heavy clash near a boundary throw-in.
The notice of investigation lodged by umpire observer Andrew Ball will be thrown out unless the vision shows that a South Fremantle player has a case to answer.
"The WAFL camera did not capture it because it followed the play up the ground," a WAFL spokesman said.
Morabito has steadily increased his game time and influence in Peel's past six league matches in his return from a knee reconstruction at the start of last season.
The Morabito investigation is different to the new system introduced by the WAFL in March in response to the clash between West Coast's Mitch Brown, who was playing for East Fremantle, and young Bulldog Mason Shaw who was left with a broken cheekbone.
Brown had no case to answer because there was no video of the incident and witnesses, such as South Fremantle's Toby McGrath, who claimed to have a clear view of the clash, were not interviewed.
The WAFL then introduced a system to allow its operations manager to send a matter directly to the tribunal if there was no conclusive evidence supporting a report.
But that system remains in doubt after its first and only investigation given that WAFL Tribunal chairman Trevor O'Sullivan found insufficient evidence to support a guilty finding against Perth's Chris Billings for an incident that left West Perth forward Alex Elisseou with a broken jaw.