Anthony Mark Spencer

Anthony Mark Spencer (1955 – 28 April 1985) was an Australian outlaw biker noted for his role in the Milperra massacre of 1984.

In the aftermath of the massacre, Spencer was charged with first-degree murder. He was denied bail and held in jail. Spencer became increasingly depressed in jail and felt especially guilty over Walters's killing. On 28 April 1985, Spencer hanged himself in his cell at the Parklea Maximum Security Jail while on charges of first-degree murder. His badly written suicide note read: "I, Tony Spencer, do not want my wife to have any part in my life or death. Lee Denholm is my lady and Joel is my son and they will get all my belongings. Lee, I am sorrry [sorry] for this, but remember I will always love you and my son. PPS, I want my bros to not think of me as weak, but as tired of fighting for the well being of my club. I have failed my club maybe I don't no [know]. But I do no [know] someone will do the right thing for the club". In the 2012 television mini-series Bikie Wars: Brothers in Arms, Spencer was played by Callan Mulvey.

In November 1983, the Birchgrove Comanchero chapter under Spencer broke to form the first Australian chapter of the Bandidos. Ross demanded the return of the former Comanchero "colours", a demand that was only partially met as a number of the Comanchero colours had been mailed off to Texas, which proved to be the source of much ill-will. Spencer appointed Colin "Caesar" Campbell to be his sergeant-at-arms. The Australian journalists Lindsay Simpson and Sandra Harvey wrote that Spencer seemed ill-suited for leadership as there was a "permeant feeling of uneasiness about him. He was their leader, he made the decisions, but leadership did not sit easily on his shoulders". Over the course of 1983 and 1984, relations between the Bandidos and the Comancheros grew increasingly tense. On 9 August 1984, three Comancheros were beaten up by the Bandidos at the Bull and Bush Hotel, which in turn led to a biker war being declared on 11 August 1984. Over the rest of the month, there were a number of incidents involving shootings, though no deaths, between the two clubs.

On 2 September 1984 at the parking lot of the Viking Tavern in the Sydney suburb of Milperra, a swap meet was being hosted by the British Motorcycle Club of Sydney. During a swap meet, used and new motorcycle parts along with motorcycle-related memorabilia and trinkets were put on the market while barbecue food and alcohol were sold in plentiful quantities. Spencer had learned that Ross and the Comancheros were present at the swap meet waiting for him, and decided to confront him rather staying away, which he thought was cowardly. Spencer had called upon his men and armed themselves for the swap meet. Spencer who was determined to prove that he was a brave leader was full of machismo that day as he stated: "We'll go anywhere to show the other clubs we're not scared. If the Comancheros are there, we'll go ahead as planned. We'll show our colors and bash them".

Spencer's relations with Ross started to decline when he was not invited to Ross's wedding. Ross's bride, Vanessa Eaves, had vetoed having Spencer at the wedding under the grounds that: "Snoddy is always stoned and you know how stupid he gets. I'm not going to have him ruin my wedding". Spencer formed a common-law relationship with his girlfriend, Lee Denholm. Having a stable relationship also weakened his loyalty to Ross as he no longer needed his approval to feel loved. In 1982, Ross broken the Comancheros into two chapters with one remaining under his leadership while Spencer became the president of the new Birchgrove chapter. By this point, Spencer was complaining that Ross – whom he had once revered – was treating him like a child in need of his strict supervision.