Curtis can be found standing with other hobos in Dignity Village; taking cover as soon as Trevor calls out to him is recommended, since he'll suddenly fire a few shots at the player with a Pistol before turning and running away. At that point, he can be subdued easily with one shot from a pistol or the Stun Gun. If the player wishes to kill him, they can do so with any weapon, such as a Sniper Rifle from a distance.
If captured alive, Curtis reveals that he has far-left political views and is an activist campaigning against Capitalism, and despises the government and its stooges. He says that he was incarcerated after a sit-in protest outside The Exchange in Algonquin, Liberty City (maybe a parody of the Occupy Wall Street protest movement that started in New York City in 2011). Things went wrong at the demonstration and Curtis and the others turned on each other and supposedly fought, which led to him being imprisoned. He either escaped or he was released (it isn't known which), and traveled to the State of San Andreas. When Trevor asks Curtis why he was arrested for a second time, he told him that he attended an anti-globalization rally and assaulted a cop with a fire extinguisher. Since then, he has made a conscious decision to "reject capitalist society" by living at Dignity Village in San Andreas.
This old-timer's one of them crazy anti-establishment types, lives outside the system in some kind of hobo camp. Might look harmless but watch yourself, he's got a couple of screws loose alright.
- When Curtis asks Trevor if his father ever said that he loved him, Trevor reveals that his father abandoned him in a shopping mall, which Trevor then burned down in retaliation.