STATEN ISLAND, N.Y. -- A hate-crime suspect's Instagram activity has landed him in deeper trouble -- after cops found a post suggesting, "Let's shoot some cops in their patrol cars," police allege.

Michael Kish, 19, of Clifton, was arrested last week on charges he and an accomplice, Christian Schlagler, 18, of Sunnyside, scrawled swastikas, the words "White Power," and other racial epithets at the Eltingville station of the Staten Island Railway.

The graffiti included what investigators believe is Schlagler's Instagram handle, and that led police to Kish's account, law enforcement sources said.

Investigators then found a conversation about a month ago detailing what's thought to be Schlagler's recent arrest on a bench warrant, sources said.

Kish, posting as "hurt_shoulder," then wrote, "He's out. Let's shoot some cops in their patrol cars," followed by "emoji" images of a smiling police officer, an alien and three guns, authorities allege.

He continued, "(Expletive) the #NYPD bunch of (expletive). (Expletive) the squad that got lit up in Brooklyn, and (expletive) their families," police allege.

Sources said that's likely a reference to the fatal ambush of NYPD Officers Rafael Ramos and Wenjian Liu in Brooklyn on Dec. 20.

Police re-arrested Kish when he returned to court Wednesday for the graffiti case.

Prosecutors have charged him with fourth-degree criminal solicitation, a misdemeanor punishable by up to a year in jail, according to information from Acting District Attorney Daniel Master's office.

The criminal complaint against Kish lays out the rational behind that charge - through Instagram post, Kish "solicited, importuned, and attempted to cause another person to engage in conduct constituting a felony, to wit, and among others, Murder in the First Degree."

The complaint points to a response under Kish's post, "sounds legit," to further the solicitation charge.

Another photo posted under "hurt_shoulder" shows Kish holding what appears to be a gun to the camera, with the comment, "Oh how I wish your head was at the other side of this barrel," according to law enforcement sources.

Investigators tracked the internet address of the Instagram account to Kish's Vanderbilt Avenue home - the same address he listed on a Sanitation Department job application, the complaint alleges.

Kish and Schlagler still face three felony counts of first-degree aggravated harassment, which includes a hate-crime component, as well as misdemeanor counts of criminal mischief and making graffiti, in the train station case.

Kish was arraigned Thursday in Stapleton Criminal Court, where his bail was set at $1,000 until his next court appearance June 10.

Attempts to reach him were unsuccessful Thursday.