According to the news reports, the situation unfolded near dark. Most of the animals killed are nocturnal hunters so they would be active and pose a risk to human life and safety. The Department of Natural Resources has tranquilizers and trapping equipment, but the experience would be limited to smaller bears. The tigers and lions, which were the majority of the animals killed would require a much different dosage and/or different drugs than they would normally use. the trapping or attampt at tranquilizers after dark would put all of those people at risk from attack by those predators. There was little which could have been done after the animals were released without risk to people ... even the shooting of the loose animals created a risk. A 600 pould cat is dangerous, but a wounded 600 pound cat can be a killer.
With friends like Guido, you will not have enemies for long.
“Intellect is invisible to the man who has none”
"The difference between genius and stupidity is that genius has its limits."