How long is the Statute of Limitations for assault?

At the time this happened I was 60 years. I was assault by two white officers. I've never been in trouble in my lifetime was man handled twisting my arm into cuffs I was with my white son-in-law and they treated him better than me I. know it’s because I'm Hispanic. I kept telling them I was just using the public phone they kept swearing at me and telling me to shut up they put the cuffs so tight they bruising my wrists I pleaded with them to take them off telling them you’re hurting my arm and they kept telling me to shut up. I had to seek mental health treatment for the nightmares do I still have a chance to go after these officers it happened in 2011.