My sim won't die...help

i'm having something like that. i cant drown an npc when i'm playing as her. her energy need is all the way down. can someone please help? also im using origin to play sims 4. i have no mods bc my mods folder is corrupted. im playing in english. my packs are : cats & dogs, my 1st pet stuff, strangerville, moschino stuff, tiny living, island living, city living, and nifty knitting. is she human? ofc! she is base game! no packs. nothing. did you ever use cheats? yes.