#1 The Case of the Balloon Man
Hall realized Seth Motts had used the innocent clergyman to confirm a tale of kidnapping which never occurred as he reported it.
Motts had obviously stuck the balloon high in the oak as a prop. On a day without a wind, a balloon blown up by breath could never rise high enough to get into a tree that high.
#2 The Case of the Last Karan
As "the weather had been far below freezing for days," and the shack had a "broken window," the ink would have been frozen solid and impossible to draw with.
#3 The Case of the Rescue at Sea
Hall knew that Long's story of hitting Smith and accidentally killing him while retraining him from drinking ocean water was false. If the supply of fresh water had given out "three days ago," as Long claimed, he would have been dehydrated, and therefore could not have wiped "the perspiration from his brow."
#4 The Case of the Open Door
Although Jordan carefully built up the impression he had never visited the John house before, he knew while standing in the attic that the chime was from the back door.
#5 The Case of the Dead Boxer
Tony could not have gained 13 pounds in one day. He fought on the night of his death for the state middleweight -- 160 pounds -- title. When found, he had on someone else's clothing, for the card in his pocket gave his body weight as an impossible "173 lbs."
#6 The Case of the Lookout
The woman dressed as a nun admitted being the lookout after Hall had seized her down the block.
Hall, too, had noticed the lipstick on her coffee cup and knew she was not a real nun, since nuns don't wear lipstick.