help! i think we have been hacked!

hi...we recently took a trip to cali...a family member there used to work for the govt for 25 yrs with computers. while there we saw that he had hooked a web cam to my daughters home computer without permission. he also took the cd home to the web cam and we feel he downloaded it on his end. 5 yrs before he was also the one who set up my daughters computer for her, and we feel he is inside her computer because she keeps receiving emails to him in her inbox. heres my question...while in cali my hubby took his new ipad and used our daughters wifi. since weve been home my hubbys ipad has been receiving many many porns and the final straw was when a child porn site showed up. we have contacted the fbi and reported this. could he have, while we were there using my daughters wifi, have also gotten into my husbands ipad just as he did with my daughters pc?we now have received things with his name on it but hes making it look like its from my husbands screen name. keep in mind he worked for the govt for 25 yrs and computers is his speciality. please help...we are at a loss for words and don't know how we get him out of our devices. has anyone ever heard of this?????thanks for any help in advance....feather..