Got a ticket for red light am i guilty?

I was going to work today and i was behind a big truck going really slow. I was following him. I passed the intersection ,but when i glanced to my left i saw the sign said walk for pedestrians. The driver behind me had stopped, 5-8 seconds later the other drivers started driving, i do not know yet if i got the ticket since it just happened today, but i think i passed the red light. i have still no idea though because i couldn't see the light due to the truck in front of me... this was a intersection that has cameras. So am i guilty? will i get a ticket? should i fight it?