UPDATE: 4-year-old is dead after a handgun is left unsecured, cops say

Bentley Thomas Koch, 4, of Chestnuthill Township, Monroe County, died June 18, 2017, in Lehigh Valley Hospital-Pocono after shooting himself, authorities say. (Yanac Funeral Home photo | For lehighvalleylive.com)

A 21-year-old Monroe County man was charged with involuntary manslaughter and related charges Tuesday in the shooting death of his 4-year-old son, Pennsylvania State Police said.

Troopers had responded about 11:10 a.m. June 18 to the home of Ryan Patrick Koch in the 500 block of Ash Lane in Saylorsburg, Chestnuthill Township.

Koch's son had suffered an apparent gunshot wound to the face and was taken by West End EMS to Lehigh Valley Hospital-Pocono in East Stroudsburg, according to a news release from state police at Fern Ridge.

Bentley Thomas Koch died from the wound and his death was ruled an accident, county Chief Deputy Coroner Michael Sak said.

His mother, Lexie Antonini, was listed as a Freemansburg firefighter at the time of the shooting.

Following an investigation, the Monroe County District Attorney's Office approved the manslaughter charge against Ryan Koch in addition to counts of endangering the welfare of a child and reckless endangerment.

Koch was arrested Tuesday at home and arraigned before District Judge Colleen Mancuso.

He was sent to the Monroe County prison in lieu of $200,000 bail and has a preliminary hearing tentatively scheduled Oct. 20 before Mancuso.

Kurt Bresswein may be reached at kbresswein@lehighvalleylive.com. Follow him on Twitter @KurtBresswein. Find lehighvalleylive.com on Facebook.