A Chicago man has been charged with murder in the death of his 2-month-old son in April.

Anthony Evans, 23, has been charged with one count of first-degree murder in the death of his son, Kayson Flowers. At his first court appearance on Thursday, Cook County prosecutors said Evans claimed a demon made him do it.

Prosecutors said Kayson likely had been dead for several hours before being returned to his mother.

Kayson's mother, Kayla, and her family attended Evans' detention hearing on Thursday, wearing buttons bearing Kayson's picture, as a judge ordered Evans held at Cook County Jail while he awaits trial. Her twin sister, Kaitlan, embraced a sobbing Kayla outside the courtroom after the hearing.

"I try to comfort her the best way we can as a family," Kaitlan said.

According to prosecutors, Evans was caring for Kayson in April. Kayla thought the baby was simply spending time with his dad, but when Evans dropped Kayson back off with her, he told her the baby had been "sleeping for a long time."

When Kayla got home and checked on her son, Kayson wasn't breathing. The baby was rushed to the hospital, but doctors couldn't save him.

Prosecutors said an autopsy later found the baby suffered multiple injuries consistent with child abuse, including a brain bleed and blunt force trauma.

"This hurts, losing my 2-month-old son," Kayla said on Thursday.

Prosecutors said Evans wanted Kayla to get an abortion when he found out she was pregnant last year.

"I was in shock when I found I was pregnant, seven weeks pregnant with him. I was happy," she said.

Court records show, in February, just days after Kayson's birth, Evans allegedly punched Kayla in the stomach, sending her to the hospital.

Kayson's family said Evans arrest on Monday was thanks to their church community who "made noise" when something wasn't right, and good police work coming together.

"It's been a long process. It's been long for Kayla and for the Flowers family," said Joe Huizenga, pastor of Roseland Christian Ministries.

Evans is due back in court in December.

For Kayson's family, Evans' arrest starts the process of healing, but they vowed to never forget the little boy behind it all.

"My son was a loving person, caring. I took my son everywhere I go. It's just, like, heartbreaking," Kayla said.