Idaho stabbing victim's sister claims she contacted the attacker seven times the night of the crime.

One of the victims from the gruesome killings of four University of Idaho students

last week made seven calls to an unidentified guy moments before she was slain, according to her sister.

According to her sister Alivia, Kaylee Goncalves, 21, contacted Jack seven times the night before she was killed.

Goncalves also found the Uber driver who took her late sister to the hospital on the night she passed away.

She checked her sister's phone history and looked at the surveillance footage from her neighbor's house to determine when she had come home that evening.

"Kaylee begins to phone Jack at 2:26 a.m. According to Alivia Goncalves, Kaylee phones Jack six times between 2:26 and 2:44 in the morning.

Maddie calls Jack three times between 2:44 and 2:52 in the morning, and Kaylee then calls him one last time at that time.

They both disappear without a trace.

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