Factual error: After the sewer invasion, April watches the three captured turtles drive away, then she turns to go to Splinter. Shortly thereafter, the computer screen shows GPS tracking the turtles at a location easily over an hour away from Manhattan. Likewise, the estate is referred to as being just forty minutes away from the city. (00:56:10 - 00:58:50)
Factual error: In 1999 when April is filming inside the research facility, you can see her video camera displaying Bluetooth, which wasn't available in cameras until 2002.
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