Without a Trace: Boyfriend Speaks Out About Missing Girlfriend

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PLANO, TX -- One missing person showed up in Plano Tuesday -- Christina Morris' boyfriend, Hunter Foster.

"I've known her since grade school," he tearfully told our cameras.

Questions have been swirling all week -- Why didn't he report her missing? Why did she call him 15 times the morning before she disappeared?

"He does feel like an idiot for not contacting us and waiting four days," Christina's mother, Jonni McElroy said. "It was a typical boyfriend-girlfriend fight on the phone and he just really wish he would have contacted us. He said he has to live with that the rest of his life."

"I just want her to come home and be alive and safe," Foster said.

Beefing Up Search: Drones Get Greenlight to Help Find Missing Woman

Meanwhile, the search for the missing 23-year-old Fort Worth woman is expanding. A command center was set up at Legacy Church in Plano Tuesday.

Texas Equusearch has worked on high-profile cases like Natalee Hollway and Caylee Anthony. Now they're bringing in their expertise and equipment to find Christina Morris.

ATVs joined the foot brigade of volunteers who have been out looking for Morris for the past 10 days. Drones will also be used in wooded and high grass areas where volunteers can't go.

Christina Morris disappeared from the Shops of Legacy nearly two weeks ago. She was last seen on surveillance video walking into a parking garage with a friend around 3 a.m.

Closing Comments: Facing a Parent's Greatest Fear