Continuity mistake: When the turtles return April to the roof after erasing the pictures off her phone, she takes more pictures holding her phone horizontally. Then, at Eric Sachs manor when she shows him the pictures, they are shown to have been taken in vertical mode.
Revealing mistake: When April first takes the photograph of the symbol, she actually has the camera in selfie mode, you can see her face on the phone.
Answer: She was trying to send them away to save them from the experiments. The first place to search if some experimental animals get lost are the houses of the people that are involved.
Anastasios Anastasatos