A judge may allow a child to testify if there is good reason to believe that the child's testimony is reliable. For example, if the child is able to give a detailed and accurate account of an event, or if there are other witnesses who can corroborate the child's story. In cases where a child's testimony is essential to the case, special measures may be taken to protect the child from undue stress, such as the child testifying in a closed-circuit television or in a room outside of the courtroom.