Art Theft Mystery

The actor Max Nail had a party in his house in Hollywood last night. During the party, someone stole a picture in a large frame, but nobody saw anything. The painting was in a locked room and the door was still locked this morning when Max went to get the painting. He was going to lend it to the Museum for a special exhibition next week.
The painting was in the room on the first floor. All windows were locked except one small window.So the thief can't have gone into the room throught the door and throught the small window. Near the window are found small pieces of wood. The pieces must have been from the frame of the picture. There were found muddy footprints (shoes size 36) between window and wall where the painting was hanging. So the thief must have been a child or a very thin person, who has got small legs.
There are another proofs, which are found in the garden. The frame of the paintng was found in pieces at the bottom of the garden. The thief might have been in hurry or the painting was so big so he/she decided to broke the frame of the painting to became smaller and to be transition easier throught the small window. Small,sharp knife was found by dustbin. Footprints (shoes sizes 36 and 44) were lead from lawn to road via dustin.

Jake Silversmith is an art expert, was looking at the painting last week and offered to buy it. The painting can't have been stolen from J.Silversmith, because he is a rich person and he can buy the picture. So the painting was stole by somebody else.

Justina Goodman is Max's cousin and poor relation. She asked Max for money. So J.Goodman could be the thief of the panting, because if she stole the painting and sell it for a large sum of money,she will receive money of which she needs. So she is one of the suspects.

Frank Constance is Max's neibourhood. He is mid 60s. He is shortand heavy(shoe size 41). Max owes his money. F.Constance can't be the thief, because his shoe size is 41 and because is heavy.So the person , who stole the painting is somebody else.

Dave Thorman is window cleaner and art enthusiast. He came with his daughter. She is at the age of fourteen. D.Thorman and his daughter(14) must have been the thiefs. There are proves:
-The crime was done by two.
-The window cleaner has the keys for all rooms.
-The shoes sizes 36 and 44 are of the father and of the daughter.
-The daughter can come into the room throught the small window.
So the thiefs are Dave Thorman and his daughter.