Omaha Police announced Tuesday morning an arrest was made in the death of 27-year-old Tari Glinsmann, the convenience store worker found shot to death last Wednesday night. The suspect is identified as 15-year-old Juan Castaneda.

Castaneda was taken into custody on Monday and is being held at the Douglas County Youth Detention Center on a charge of first-degree murder.

Douglas County Attorney Don Kleine told Channel 6 News Castaneda will be in court Wednesday morning and be charged as an adult.

Tari’s father, Eugene Glinsmann, plans to be in court when Castaneda makes his appearance.

"It’s been a real tough week. We've been fortunate we've had a lot of people come around and try to help us emotionally and then going to the candlelight vigil on Sunday and lots of people from around the community, in the neighborhood, old friends of Tari all showed up. Made me feel very, very good."

All he wants to know is why his daughter shot and killed. He wants the suspect to get a fair trail, but he does not want people to feel sorry for the suspect.

"To get what he deserves, it would be up to other people to make that decision on whether he would be executed or get life in prison, but he needs to take on the responsibility on what he done if he was the one that evening. He's a young kid, but he's done an adult thing, he has now stepped up the line where he is now an adult."

Channel 6 News has obtained some of Castaneda's juvenile court records. In April of this year, one entry says “the child is a danger to himself and others and his continued detention is a matter of immediate and urgent necessity." Castaneda, who turns 16 next month, had been fighting and threatening others.

The documents also reveal that a shotgun had been found in his bedroom, that he admitted to being a gang member and that he had been suspended from school for fighting.

Channel Six News has also learned that the stolen gun charge was later dropped to disturbing the peace. For that, a judge allowed Castaneda to be monitored by a GPS device at home. For three months, the suspect never missed curfew or caused any issues. An OPS Spokeswoman says he attended Benson High "sporadically" in October. It was his 2nd attempt at 9th grade.

Wednesday night, a woman who says she's the suspect's girlfriend e-mailed Channel Six: "Everyone should stop talking nonsense. Juan is innocent. I know this for a fact! I was with him that night."

Eugene Glinsmann said, "It's been so hard for us. Not knowing why...that's the only question on my mind is why. And now to find out it's a 15-year old boy."

Tari Glinsmann was one of three people shot in cases police say are related. She and Luis Fernando-Silva were killed, a third man was wounded.

When questioned whether Castaneda was considered a suspect in the other two shootings, a police spokesperson said the department had enough evidence to make one arrest in one shooting. She added the department still believes the crimes are related.

Fernando-Silva's shooting was reported to 911 at 10:44 that night. At 11:06 p.m. Charles Denton was wounded as two men tried to rob him at an ATM. Then at 11:14 p.m. police received a call of a woman (Glinsmann) down in the parking lot of a convenience store at 52nd and Leavenworth.