Attorney for the mom of a 15-year-old school shooter opened her manslaughter trial by quoting Taylor Swift's 'Bad Blood'

• Jennifer and James Crumbley are facing manslaughter charges for their son's school shooting.
• The case against against the parents is the first of its kind.
• In her opening remarks on Thursday, Jennifer Crumbley's attorney quoted Taylor Swift's "Bad Blood."

In a fist-of-its-kind case, the parents of a 15-year-old school shooter in Michigan are facing manslaughter charges, accused of making a firearm too easily accessible and ignoring warning signs.

And as the high-profile trial got underway on Thursday, the attorney for the mother — in a surprising choice — warmed up the jury with Taylor Swift Lyrics.