Who killed Jude and mom on The Fosters?

The tragic deaths of Jude and his mother, Lena Adams Foster, were not caused by a murder. They were both victims of a car accident, which is how Lena died in the season 4 finale.

While Jude was not initially killed in the accident, he was left severely injured. He passed away later in the hospital, after a long battle for his life.

It's worth noting that this event was a significant plot point in the show and a devastating loss for the Foster family and the viewers.