Someone else must have been there with Asha

If a witness gave the tip about Asha being pulled into the green car, doesn't that indicate that someone else must have been there with Asha in the middle of the night when she was pulled into the green car?

In other words, the fact that someone knew about the green car and told the police about it means that Asha was not alone (maybe she was with a friend?) when she was abducted.

There was no video camera or surveillance footage that could have captured Asha being pulled into the green car.

Plus, the existence of another person with Asha that night could be the missing link between the Dedmons and Asha. If Asha was meeting up with a friend, maybe that friend knew the Dedmons.

What do you think?