What's up with my uncle plz answer?

ok my uncle i live with him temporary he has a huge tattoo on his back of the Templar's cross. All of his crosses in house are templar crosses and he has paintings of a couple famous headmasters during the crusades he knows a little too much about weapons from guns to blades. Also alot he sneaks out at night and doesn't come back till the morning and sometimes he has like weird cuts he said he was at a martial art cl but i know for shure he doesn't take any and not at that late. When he doesn't have any cuts im like where have u been all night just wondering. he would just yell no where mind your own Business. Do anyone have a idea what you think he's doing is he some type of serial killer??? Also he has all this money and he doesn't have a job????