I've removed this paragraph:  
 Perhaps most puzzling is the fact that the sketch released by the Smart family and based on Mary Katherine's recollections depicts a perpetrator with no facial hair, whereas photographs of Brian Mitchell both before and after June 5, 2002, show him with a full beard. 
 This is one of the most blindingly stupid things I've ever read on Wikipedia.  What is remotely puzzling about a guy shaving his beard then growing it back again?  At the time the Smarts first saw him, he was doing odd-jobs in the neighbourhood (fixing roofs etc.), so he shaved his beard to make himself look more presentable.  Then grew it back again.  Astonishing stupidity