Dealing with the loss of their mother, two young girls Annie and Jessica Andrews perform a séance in the hopes of contacting their mother's spirit. Soon after the séance, the girls begin to experience strange occurrences in the house. 

Watch:

"Your Worst Nightmare" Season 2 Episode 1 'Bump in the Night'

"The Bad Seed" (1956)

"The Death and Life of Marsha P. Johnson"

Sources: 

https://en.wikipedia.org/wiki/Daniel_LaPlante

https://medium.com/chameleon/daniel-laplante-a-chilling-story-of-a-disturbed-young-killer-8ee51bfc7db9

https://www.talkmurderwithme.com/blog/2021/2/3/daniel-laplante