From Within (2008)

In a small Maryland town, the suicide of an outcast teenager triggers a string of violent suicides. These suicides seem to stem from a curse which spreads when any person, who witnesses the suicide, is possessed by an unseen evil force which leads them to commit suicide themselves. A young teenager, named Lindsey, thinks there is a connection of the events to Aiden, the outcast brother of the first suicide case. But Lindsey must race against the clock when she witnesses her mother fall victim, and must try to find a way to stop the curse before it kills her too. Meanwhile the God-fearing townspeople, led by a fanatic preacher with a connection to the events also, form a vigilante group to take the law in their own hands.