serious bullying concerns

hi everyone,

my family friend has been involved and was friends with a group who was invloved in an e cigarette incident or vaping,most of the people involved had been removed from the school

and now one of the kids is sending her threats on instagram that i know you have been talking trash about me,the problem is that kid is known to beat people up and make videos and post on tiktok or egg peoples houses

my family friend is scared the same is going to happen to her,she isnt a saint but shes not like them either

what can she do now to protect herself and her house or from potential danger out in the open from them?