NEW : Police investigating whether someone helped tiger escape . The parents of mauled Carlos Sousa : There will be ` ` no more . '' Police said Sousa was killed just outside the tiger 's enclosure . Two tiger victims are in stable condition , doctor says . Sousa was found just outside the tiger 's enclosure , police say .
NEW : Police investigating whether someone helped tiger escape . The parents of mauled Carlos Sousa : There will be ` ` no more . '' Two tiger victims are in stable condition , doctor says . Sousa was found just outside the tiger 's enclosure , police say .