She described her sister as a lovely person with a great smile.
"I want you to know you broke my parents' heart," she told the defendant.
Stigell was asked later about the judge's emotional reaction. "It was overwhelming and it meant a lot to me," she said. "It's just a testament of how everybody involved in this has been so good."
A prosecutor read a statement from Hover's sisters in which they wrote about her estranged brother's drug abuse and suicide, and their mother's struggles with alcohol and dementia.
"Her senseless murder irreparably damaged our family," Charlotte Rosenberg and Victoria Rudolph wrote.
Alcala has spent the last three decades tangling with California authorities in a series of trials and overturned convictions. He eventually was found guilty in 2010 of killing four women and a 12-year-old girl in Southern California in the 1970s.
He represented himself at trial, offering a defense that involved showing a clip of his 1978 appearance on "The Dating Game" and playing Arlo Guthrie's classic 1967 song "Alice's Restaurant."
Alcala had been eyed in Hover's death for decades and in Crilley's killing for at least several years. A detective went to talk to Alcala again in 2005. According to court papers, on learning that the investigator was from New York, Alcala asked, "What took you so long?"