A Louisiana man killed 8 children, 7 of his own. His family said warning signs preceded the tragedy

KTBS, FACEBOOK, SHAMAR ELKINS, CNN, Facebook/Shamar Elkins By Zoe Sottile, Lauren Mascarenhas, Isabel Rosales, Maria Sole Campinoti, Taylor Romine, CNN Shreveport, Louisiana (CNN) — Freddie Montgomery looked across the street as he walked home from visiting a neighbor and saw Shamar Elkins. The 31-year-old was sitting on the front porch of his Shreveport, Louisiana, home