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GREENVILLE, S.C. (AP) -- Authorities have dropped charges against a Greenville man accused of setting fire to a doghouse after trapping a dog inside.

Solicitor Walt Wilkins said Wednesday he has sent the case against 53-year-old Isaac Henry Anderson back to police for more investigation.

Anderson was arrested in December and charged with third-degree arson, ill treatment of animals and conspiracy.

Investigators say someone put a cinder block around the dog's neck on Nov. 9 so it couldn't escape after the doghouse was set on fire.

The dog named "Pookie" survived the attack but was treated at a veterinarian's office for burns and other injuries. The collie-chow mix now lives at an animal sanctuary in Lake Toxaway, N.C.

(Copyright 2011 by The Associated Press. All Rights Reserved.)