Hooded Gunmen Kill 13 at Mexican Ranch Drug violence toll tops 15,000 in 2 years By Mary Papenfuss, Newser User Posted Feb 25, 2010 3:28 AM CST 7 comments Comments Alleged Mexican gunman Oscar Renteria Villarreal is guarded just days before new drug violence claimed the lives of 13 more people. The guards' faces are covered to protect them from reprisals. (AP Photo/Guillermo Arias) (Newser) – Hooded gunmen stormed a southern Mexico ranch last night and shot dead the owner, his three sons, four others and five police officers who battled the attackers. Investigators believe the tragedy was linked to drug cartels. The shootings follow the death of 19 people in Tamulipas county in the last few days. The death toll in drug-related killings is now more than 15,000 in just two years.