Random.

By someone known to be off the rails.

Mike

Talat Jehan Khan was sitting at a picnic table when police said 24-year-old Miles Joseph Fridrich stabbed her multiple times. Witnesses said he came out of nowhere.
— Read on www.khou.com/article/news/crime/miles-joseph-fridrich-murder-suspect/285-ea33f9b7-e030-47ff-b0f0-4a12aaae858e