SEATTLE -- Seattle Police Chief John Diaz has expressed a desire to fire Officer Shandy Cobane, who was videotaped last year stomping on a suspect in a robbery case and saying he'd "beat the (expletive) Mexican piss" out of him, according to two people familiar with the case. However, Seattle Police Officer's Guild President Rich O'Neill said late last week that Cobane had not received his Loudermill letter -- a document that notifies the officer of a hearing to respond to the chief's disciplinary decision. A Police Department spokesman cautioned Monday the case was still open and that reports of the chief's decision were premature. A formal announcement from the department is not expected this week. The incident, filmed April 17 near Westlake Avenue North, shows Cobane making the slur before stomping the suspect's arm. Another officer, Mary Woollum, is seen stomping the man once. That man was later released by police. He was not charged. Sources familiar with the case say Cobane's force against the man was considered justified in the context of interrogating a potential robbery suspect whose hands were free, which influenced City Attorney Pete Holmes' decision not to file charges against Cobane. However, there was a question of why the officers didn't handcuff the suspect before he was questioned. "Though the incident was marred by an unacceptable and unnecessary racist comment, our office concludes that neither officer's conduct was criminal, and I decline to file misdemeanor charges," Holmes said in a December statement. Click here to read Holmes' statement on the Cobane case. When the incident caught on videotape occurred, police said the man had not yet been seen in a "show-up" -- a cop term that describes when potential suspects are shown to a witness or victim for purposes of identification. Police typically try to avoid having a suspect handcuffed during a show-up because it could taint the witness's memory and be considered prejudicial in a court case. King County Prosecutor Dan Satterberg said on Sept. 1 that state hate-crime charges did not apply against Cobane. Cobane, who has been with the department since Oct. 1993, made a tearful apology the day after the video was first broadcast on local news the night of May 6. He and Woollum were placed on administrative reassignment May 7-- even though the internal department investigation started the previous month. Asked by seattlepi.com on May 7 if the broadcast sped up the reassignment of Cobane and Woollum , Diaz said, "not really." He added that additional information came in, but did not elaborate on why the reassignment came later. "A day has not passed in which I wish I could rewind the events of that night and take back those hateful words expressed," Cobane said in his May 7 apology. "As a result of my comments, I have not only embarrassed myself, but I have truly let down my colleagues." Interim Police Chief John Diaz, Assistant Chief Nick Metz, Seattle Police Officers Guild President Rich O'Neill and Cobane's sergeant, Jim Dyment, were among those present for his apology. "I do appreciate the comment by Detective Cobane, but let me make it perfectly clear: The use of race, racial slurs or ethnic slurs is never acceptable for anybody in our department of for any police agency in this county," Diaz said that night. The incident also sparked a debate over who owned the rights to the Cobane video. The cameraman was arrested in August after allegedly taking equipment from the station where he used to work, and he's been vocal that the station, Q13 Fox, decided not to run the video because of a close relationship with police. Q13 has partnered with the Seattle 911 blog to profile some Western Washington cold cases. The Seattle department launched a separate investigation to see if officers tried to prevent the release of the footage by the station, but that complaint was not sustained. Cobane's incident was one of several videotaped incidents that have put Seattle police actions in question. The Aug. 30 fatal shooting of John T. Williams was the most publicized incident in a series of violent interactions between citizens and Seattle police that have prompted a federal investigation of the department on a number of issues, presumably including the Williams case. Seattlepi.com is a media partner of KOMO News.