Pegasus Malware Detection by Avast Full Scan & Boot Scam

A blackmailer claimed he put a Pegasus Malware product that controls my camera. He hacked my email, sending me a blackmail letter from my own email address, claiming something that could not have been seen. But I left one camera uncovered. He claims he could turn it on. It was off when checked by me. He got around my two-step verification, leaving no record of login that comes with that, but may have hacked the email address used to confirm that. I ran Full Scan and Full Boot Scan, finding nothing. He could be lying & fishing. I would like to know how likely it would be to hide it from AVAST Premium. By the way, I don’t even know if this Pegasus product is real. Can anyone tell something; this evidently has nothing to do with Pegasus Mail. I don’t use that. As he has access to my email address, that I have yet to close but intend to, he might expose me to charges of sexual harassment & sex offender.