Christina Grimmie: New Details Emerge About Her Killer

— -- New details have emerged about the man who murdered former "Voice" star Christina Grimmie earlier this month.

According to a recently-released police report obtained by ABC News, 27-year-old Kevin Loibl, who fatally shot Grimmie and himself at her concert in Orlando, was a loner who'd harbored an obsession with the singer for at least six months to a year.

Cory Dennington, who spoke to police and knew Loibl for more than a decade, believed he was Loibl's "only friend in the world." According to the report, Dennington said that Loibl told him that Grimmie's belief in Christianity had "changed him," and that Loibl would spend hours watching her YouTube videos and monitoring her social media accounts.

Dennington told Orlando detectives that Loibl harbored fantasies of dating Grimmie, calling her his "soul mate," and that he tried to improve his appearance to impress her, undergoing Lasik surgery, teeth whitening, hair implants and significant weight loss.

However, Loibl never told Dennington how he planned to meet Grimmie, and Dennington did not know that Loibl had planned to go to her concert the night he killed her. Though Dennington acknowledged that "in hindsight Loibl had said a lot of weird and...sad things," he did not know Loibl owned a gun. The last time Dennington saw Loibl was June 5.

On June 11, Grimmie, 22, was shot and killed at an Orlando concert venue while she was signing autographs and selling merchandise. Loibl, who was carrying two guns that he'd purchased legally, shot her and then killed himself following a scuffle with Grimmie's brother Mark.

A few days later, the singer was laid to rest in her hometown of Medford, New Jersey.

"Christina was awesome," her brother said at a vigil for his sister. "She loved singing, she loved the Lord, and she loved me, and she was just my baby sister."