An off-duty NYPD officer has committed suicide on Long Island, becoming the fourth city cop to take his own life in the last three weeks.

Police said Kevin Preiss, 53, a veteran cop assigned to the Bronx, was found dead at his home in Hicksville in Nassau County with a self-inflicted gunshot wound to the head around 9:50 p.m. Wednesday, according to the New York Post.

He leaves behind a wife and several children and was just three days away from his 25th anniversary on the job, according to the publication.

The victim is the fourth New York cop to commit suicide this month and the sixth cop to die by their own hand this year, officials said.

Kevin Preiss, 53, (pictured) has committed suicide on Long Island, becoming the fourth city cop to take his own life in the last three weeks

Preiss, 53, was a veteran cop assigned to the Bronx (pictured with fellow members of his department)

He was found dead at his home in Hicksville in Nassau County on Wednesday

On June 14, Police Officer Michael Caddy, 29, died after shooting himself in the head inside a car parked on a Staten Island street, behind the 121st Precinct. An off-duty officer discovered him.

Deputy Chief Steven Silks, 62, was found dead in a police vehicle in Queens on June 5, a month before his mandatory retirement and having spent 38 years on the force.

The next day, NYPD officers found the body of missing detective, Joseph Calabrese, 58, at a Brooklyn beach. He had been on the force for 37 years.

Police say both died from self-inflicted gunshot wounds to the head.

The suicides have stunned the nation’s largest police department, causing police leadership to speak out about a mental health crisis.

He leaves behind a wife (pictured with him) and several children and was just three days away from his 25th anniversary on the job

The victim is the fourth New York cop to commit suicide this month and the sixth cop to die by their own hand this year, officials said (Preiss is pictured, center)

Police Commissioner James P. O'Neill released a statement on June 14, remembering the officers who had taken their lives and calling on the department to 'end the crisis together'.

'This is a mental-health crisis,' he said in the statement. 'And we — the NYPD and the law enforcement profession as a whole — absolutely must take action. This cannot be allowed to continue.

'Cops spend so much of their days assisting others. But before we can help the people we serve, it is imperative that we first help ourselves.'

Frank Dowling, a psychiatrist and the medical adviser to POPPA - a confidential, nonprofit assistance program for NYPD officers - tweeted the news of the fourth cop suicide early on Thursday

Two officers died in suspected suicides within 24 hours of each other last week. Deputy Chief Steven Silks (left) was found dead in a police vehicle in Queens on June 5. Detective Joseph Calabrese (right) was found the next day at a Brooklyn beach

O'Neil advocated for officers and NYPD personnel to seek out assistance when needed - and that seeking it isn't a sign of weakness but of 'great strength'.

Michael Caddy, 29, a six-year veteran of the force, shot himself in the head on June 14

'Today our city is mourning the loss of another officer gone too soon,' Mayor Bill de Blasio said in a tweet on June 14.

'Three brave members of our police force have taken their lives in recent days. All of them led lives that made their communities better. All of their lives had meaning.'

Tweeting in response to the latest suicide, Frank Dowling, a psychiatrist and the medical adviser to POPPA - a confidential, nonprofit assistance program for NYPD officers - urged officers to seek help.

'Fourth NYPD suicide in very short time frame. NYPD Officers-look In the mirror-take a good look at your coworker. See a 1085 or 1013-ask for help. Ask your partner are you ok? Tell them to get help. POPPA. Confidential. Career saving. Family saving. Life saving. @poppanyc,' Dowling tweeted around 7:40 a.m. on Thursday.

Police Commissioner James P. O'Neill released a statement on June 14 remembering the officers who had taken their lives and asserting that the department 'must end the crisis together'

Mayor Bill de Blasio tweeted on June 14 that New York was mourning the third officer to have taken his own life

Caddy, 29, a six-year veteran of the force, used a gun to shoot himself inside of a car, the New York Daily News reported.

He was going through a divorce, and leaves behind his wife and a young child.

Caddy was assigned to work on domestic violence cases.

Detective Calabrese, 58, was last heard from on June 6 after leaving his wife at a hospital, where she was recovering from a minor procedure, the New York Post reported.

Calabrese did not report to work and his black Cadillac sedan was spotted at around 3am near Plumb Beach, off the Belt Parkway in Brooklyn.

A photographer on the scene captured images of at least 100 people, both in uniform and plain clothes, searching the area immediately surrounding the water at the Plumb Beach rest area in Brooklyn.

Michael Caddy's funeral took place on June 19 at St. Ann’s R.C. Church, 101 Cromwell Ave. in Dongan Hills

Police Officer Michael Caddy's Funeral service was full to capacity with family and friends

A photographer on the scene on June 6 for DailyMail.com captured images of authorities searching the area immediately surrounding the water at the Plumb Beach rest area in Brooklyn for detective Joseph Calabrese, whose body was later found there

The massive search party continued throughout Thursday afternoon, as it had been over 14 hours since Calabrese was last heard from, before his body was found.

The 37-year-veteran of the force resided very near where his car was located.

Calabrese, who joined the NYPD in 1982, was assigned to the Brooklyn South homicide squad. He also served as a chairman for the board of trustees for the DEA.

The NYPD officers' suicides come amid a rising nationwide trend: At least 167 officers died by suicide in 2018. A hundred officers have so far taken their lives in 2019, according to Blue HELP, a Massachusetts-based organization devoted to preventing police suicides.

For confidential support in the US, call the National Suicide Prevention Lifeline at 1-800-273-8255 or click here.

For confidential support on suicide matters in the UK, call the Samaritans on 08457 90 90 90, visit a local Samaritans branch or click here.

For confidential support in Australia, please call Lifeline on 13 11 14 or click here.

Detective Joseph Calabrese did not report to work and his car was spotted at around 3am near Plumb Beach, off the Belt Parkway in Brooklyn