Antônio da Costa Santos

Wanderson was arrested on 25 February 2002, in Itu. According to the police, a 9 mm pistol found in Andinho's hideout matched that used on Toninho and on the kidnapping. The police claimed that three men from Andinho's gang, driving a silver Vectra, had attempted to stop a green Vectra shortly before Toninho's murder, intending to carry out a flash kidnapping. The green Vectra was hit by caliber 45 bullets and showed silver paint streaks from an attempt by the robbers to block its path, which also smashed one of the robbers' car headlights. This detail is confirmed by a security camera from the mall that recorded a car with one headlight off. While running away from that crime, the robbers ran into the Mayor's car, and either attempted to rob it too, or were irritated because Toninho was driving at the speed limit and blocking their way.

The police have always maintained that Toninho's murder was a common crime and that the criminals were not aware of the victim's identity. However, suspicions that the murder may have been targeted and may have had political motives were widespread, and have increased recently. Just before his death, Toninho had started investigations on alleged overbudgeting in contracts with urban cleaning companies. Toninho said he had received death threats, but was not going to be intimidated by them. The murder of Celso Daniel, mayor of Santo André and also a PT member, a few months later (22 January 2002) also contributed to these suspicions.

Toninho took office as Mayor of Campinas (the third largest city in the state of São Paulo, with over 1,000,000 inhabitants), on 1 January 2001. He was shot to death at 10:15 pm, 10 September 2001, as he was driving home alone from a shopping mall. The details and motives of his murder, which stunned the country, is still largely unknown as of 2020. His assassination was overshadowed by the deadly 9/11 attacks on the US approximately a day later.

However, the three suspects had already been killed by the police before they could be interrogated. Two of them (Valmir Conti or "Valmirzinho", 29, and Anderson José Bastos or "Alemãozinho", 22) were hiding with other two alleged members of Wanderson's gang in an apartment in Caraguatatuba. All four men died on 2 October 2001 in a shootout with a team from the Campinas Civil Police. No policemen were hurt. On 26 January 2006, two members of that team were formally indicted by the São Paulo's Public Attorney for connections to Wanderson's gang.

Antônio da Costa Santos (also known as Toninho; 4 March 1952 – 10 September 2001) was a Brazilian architect and politician of the Workers' Party (PT).