Law enforcement says a 21-year-old university student allegedly killed his mom because ‘she got on his nerves’ despite having a good relationship with her.

Emmanuel Espinoza, a pre-med student at the University of Florida, was traveling to stay with his mom, Elvia Espinoza, for a family event.

When he arrived, she opened the door and Espinoza allegedly started stabbing her in the doorway.

Elvia tried to run away, but Espinoza kept stabbing her until she died.

Espinoza then called 911 and reportedly confessed to everything.

The arrest report states he told deputies that his mom got on his nerves, and he wanted to kill his mom for several years despite being on good terms with her.

Espinoza was charged with first-degree murder.