7 year old Connecticut boy accidentally shoots neighbor

There is an unanswered question in this incident that will likely come to light. How did a 7 year old Connecticut boy get his hands on his neighbor's gun and then accidentally shoot him in the chest? From the article:

State Police said the 7-year-old boy accidentally shot his 51-year-old neighbor Anthony Joseph Delucia, in the upper chest.

Police said the shooting appears to be accidental, and the weapon used appears to be a small caliber handgun legally registered to Delucia.

Delucia was taken to St. Mary's Hospital in Waterbury.

He is being treated for non-life threatening injuries and his condition is stable. 

From another article:

According to Mayor Robert J. Chatfield, Delucia is the town's local trash man.

"He is loved by everyone in town," said Chatfield.

State Police spokesman Lt. J. Paul Vance said he believes no charges will be filed and the investigation is still ongoing.

One more article:

Non-life threatening injuries for a Prospect man who was accidentally shot in the chest by a seven-year-old boy and neighbor. The boy apparently got a hold of Anthony Delucia’s, 52, handgun at Delucia’s home at 13 Summit Road, Prospect, and fired a shot.

Delucia was wounded, taken to St. Mary’s Hospital in Waterbury and is reportedly in stable condition.

He did have a permit for the handgun used in the accident, which remains under investigation.

 Every gun in the hands of a child must first pass through the hands of an adult.