When Researching Dark Themes Raises Red Flags ,How Do Writers Approach It?

Writers who include violence and murder scenes in their novels, do you research weapons or murder-related details on Google or Reddit? I’ve asked some questions on the MorbidQuestions subreddit and received some DMs from people advising me not to harm anyone and to let the authorities handle such things. I reassured them it’s all for my novel, as I’m looking for fresh ideas and different perspectives. Have you ever encountered similar experiences while researching such scenes?