Solution:

The pregnant lady.

The detective Byomkesh Bakshi noticed that the pregnant women look 6-7 months pregnant in January, May, and even in July. So that pregnant lady is the thief we are looking for and must be faking her pregnancy.

Solution:

The Lady sitting in the chair has the detector attached to the back of her blouse.

Solution:

Rick wasn't at home. He Parked his car after snow built up on the driveway.

Solution:

The thief is encircled.

Solution:

The thief is the Pakistani guy. It is because the flag of Japan looks same when upside down and no one can tell if it is upside down. So, he was telling a lie.

Solution:

Harry Potter

Explanation:
If Ron had stolen the car, he must be telling the truth, which cannot be the case since he claimed Hermione stole the car. So Ron is lying, which results Hermione did not steal the car.

Solution:

The clerk said that every day the password is CHANGED. Changed is the password.

Solution:

The receptionist was pretty clever she played with the mute button of the phone while talking with her mother. She muted everything except the word emergency, call and help. So while talking, she sounded like 'Emergency… Call… Help' to her mother and thus she called the police.

Solution:

One of the cop will move clockwise while the other will move anti-clockwise every day. In such a manner, they will catch the thief in minimum seven days.

Solution:

The clip art of thief was an easy giveaway of the name. Name of the movie is - Identity Thief.