need to no what to do

Ok I gave two people a ride they told me where to go I took them and pulled up at the place them two got out and got there boxes then they got back in so then I took them back to the place I picked them up at and dropped them off didn't see them again for days well they had stole those boxes and there was a camera watching and a detective called me and had said where are the bullets and I said what are u talking about and he said u no that place where u took him and her they caught y'all on camera I said no I gave them a ride if u seen the video I never got out and besides that I didn't even no they were stealing those boxes and the detective asked me to find out what those two people did with the bullets and help him gather them up and nobody would get in trouble so I got ahold of those two people and told them that and then they gave me names of who had them well I got most of them back nothing else was said now a year later a detective wants me to write a statement about it