(AP) — High-profile kidnapping and murder cases in Iowa have prompted state authorities to make a change to how they issues Amber Alerts.

Officials announced Wednesday that the new policy means authorities need only a description of the child, the child’s abductor or the abductor’s vehicle. Before the change, some officials had believed that authorities needed both a description of the child and the suspect.

The change drew praise from the mother of Elizabeth Collins, who disappeared from Evansdale along with her cousin, Lyric Cook, in July 2012. The girls were found dead five months later.

Heather Collins says she asked authorities several times to issue an Amber Alert for the girls, but was told they could not because police did not have any suspect information.