ALPINE, TX (KWES) - We're learning more about the investigation into missing Sul Ross student Zuzu Verk after law enforcement held a press conference Friday morning.
The search for Verk has covered 400 square miles by air and land, using "ground pounders," and included 120 law enforcement and volunteer personnel.
According to authorities, over 100 interviews and statements have been collected, 12 search warrants have been executed resulting in mounds of evidence, including computers, vehicles and cell phones.
Brewster County Sheriff Ronny Dodson said the search has expanded down to Mexico where some "comrades" were cooperating with them.
Sheriff Dodson referred to the $50,000 reward and said," We sure will use it if someone gives us that break."
Alpine Police Chief Russell Scown confirmed there is one person of interest, "One individual that knows her better than anyone else." Scown went on to confirm that person to be Verk's boyfriend, who has retained a lawyer.
When asked if he had anything to say to the boyfriend, Dodson said," These investigators are waiting to talk to you."
Verk's parents and brother were also present at the press conference. Her father Glenn and brother Miles addressed the media.
Glenn Verk wanted to thank the city of Alpine, a town that according to him "reached out with so much love and support."
Miles Verk made an emotional plea to Zuzu's boyfriend by saying, "Robert, if you love Zuzu as much as you say you do, and told me over and over, you will come down here and help the police bring my sister home."
Verk is described as 5 feet tall, 110 pounds with blonde hair and hazel eyes. Her natural hair color is brown but has recently been colored blonde.
She was last heard from during the early morning hours on Wednesday, Oct. 12.
Verk is a student at Sul Ross State University and works on campus.
Police are also asking the public for information about two cars, a grey 2006 Jeep Liberty and a 2004 Mazda Miata convertible with a beige top. The vehicles were seen driving between the hours of midnight and 10 a.m. on Wednesday Oct. 12, 2016.
Alpine police encourage anyone with information to call them at (432) 837-3486.