Man accused of murdering aunt in Mesa

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William Null By Jennifer Thomas William Null By Jennifer Thomas

MESA, Ariz. -- A man is accused of killing his aunt inside her Mesa home early Tuesday morning.

Cynthia Pesek, 61, was found dead inside her home at McKellips and Recker roads at about 1 a.m. It's not known who discovered her.

Officers said early on that they had an investigative lead in the case. That man apparently returned to the scene. Officers spotted him on a bike near the house -- inside the crime-scene tape -- and took him into custody at about 6:30 a.m.

Aerial video from the scene showed officers draw their guns as they approached the man. He appeared to comply with officers' commands and was led away in handcuffs.

Detective Steve Berry of the Mesa Police Department said the man is now the suspect in the killing. He has been identified as the woman's nephew, William Null, 41. He was booked on one count of second-degree murder.

Null periodically stayed with his aunt, who is a retired teacher with the Mesa Public Schools.

Police have not yet determined what happened in that home overnight and have not said how the woman died.