Officers responded to reports of a man shooting himself in the head in the parking lot of a Party City store on Sunday around 12:30 p.m.
They discovered 53-year-old man and a boy and girl—both 16 years old and shot.
Despite administering CPR and other efforts, all three were pronounced dead at the scene.
Police identified the teens as Alexia Rael and her cousin, Mario Salgado-Rosales, while the man was identified as Bradley Wallin.
Homicide detectives learned during the preliminary investigation that Wallin had been in a past relationship with the mother of Alexia Rael.
They say the woman filed a temporarily restraining order against Wallin last month and a hearing for a permanent restraining order had been scheduled for later this month.
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