Murder Mystery: Solve the Case

Can you piece together the clues and find the killer?

Victim: John Doe

Cause of Death: Stab wound to the chest.

Time of Death: Approximately 10 PM.

Other Notes: Defensive wounds on hands suggest a struggle.

Neighbor: "I heard shouting around 9:30 PM, but I couldn’t make out what they were saying."

Co-worker: "John left work early that day, around 7 PM. He seemed anxious."

Friend: "I saw him arguing with a man in a black coat earlier in the evening."

Suspect 1: Alex Smith - A co-worker of the victim. He claims he was home alone at the time of the murder.

Suspect 2: Jamie Lee - The victim’s neighbor. She claims she was asleep and didn’t hear anything.

Suspect 3: Michael Brown - A mysterious man seen arguing with the victim. He has no alibi for the time of the murder.

Who is the killer?