Nicole Parton

Cassandra was last seen wearing blue jeans, a black leather jacket, and a gray t-shirt.

She was carrying a blue Lilo & Stitch backpack.

Her family and authorities are extremely concerned for her safety and are urgently asking for the public's help.

If you have any information regarding Cassandra's whereabouts, please contact local law enforcement at 810-840-4000.

And for the latest crime and justice news, follow Crime Alert hourly update on your favorite podcasting app.

With this Crime Alert, I'm Nicole Parton.

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A blood-soaked morning at a Vero Beach public library has ignited a desperate maritime manhunt after a 64-year-old husband allegedly transformed a quiet parking lot into a slaughterhouse with an AR-15-style rifle.

Jesse Ellis is wanted on two counts of first-degree premeditated murder for the execution of his estranged wife, Stacy Mason, 49, and her lover, 56-year-old Danny Uli.

Both were highly respected Indian River County employees.

This was no spontaneous explosion of rage.

It was a calculated, cold-blooded killing fueled by a deteriorating 13-year marriage.

Here's Vero Beach Police Chief David Curry at the news conference.

The chief revealed that Ellis had recently obtained professional services, believed to be a private investigator, to track the pair to their clandestine meeting spot.

Chilling surveillance footage captured the husband stalking Uli's Ford Ranger at 7 a.m.

having reportedly parked his dark gray Ford F-150 on a nearby street to avoid detection before creeping toward the victims with the assault-style rifle in hand.

In a sickening display of violence, Ellis allegedly sprayed the driver's side with high-velocity rounds to take out Uli before circling to the passenger side where his wife sat.