RB Warrens, 49, of Grayslake, (pictured) was arrested in November and found with a cache of firearms and ammunition at his residence near Grayslake after he allegedly threatened to kill people, police said. | Provided Photos

A Grayslake man, who is reportedly a member of the Michigan Militia, has been released on a $750,000 bond after prosecutors say he threatened to kill his family and was found with an arsenal of guns.

RB Warrens, 49, of the 33400 block of Lakeshore Drive in unincorporated Grayslake, was charged with two counts of aggravated unlawful use of a weapon, resisting arrest and electronic harassment.

Lake County Sheriff’s Office Deputy Chief Christopher Covelli said in November that a family member of Warrens made a report with the sheriff’s office.

The family member was fearful because Warrens threatened to kill them and threatened to shoot anyone who attempted to remove him from his home, Covelli said.

Lake County Assistant State’s Attorney Caitlin Valiulis said Warrens had recently witnessed his mother collapse and die and that his mental state, according to the family, has declined rapidly.

Valiulis said the threats toward Warrens’ family members stemmed from a dispute over his mother’s will.

The family reported to police that Warrens was anti-government and had an arsenal of firearms, Covelli said.

Lake County Assistant State’s Attorney Lillian Lewis said in court that Warrens indicated he is a member of the Michigan Militia.

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Sheriff’s deputies obtained a firearms restraining order, a search warrant and an arrest warrant for Warrens.

Covelli said the Lake County Sheriff’s Office Tactical Response Team conducted an assessment and determined should a shootout occur at the residence, there was a high risk to the surrounding community.

Members of the tactical response team established surveillance on Warrens’ residence in an attempt to take him into custody at another location.

The surveillance team observed Warrens leaving the residence around 10:40 p.m. on November 4.

The team was able to conduct a traffic stop on Warrens’ vehicle and officers told the man he was under arrest.

Covelli said that Warrens was not compliant and began abruptly reaching into his clothing.

Lake County Sheriff’s Canine Dax was released and bit Warrens in the arm, which subdued him and officers were able to arrest him.

Covelli said a loaded pistol was recovered from the area Warrens was reaching.

Lewis said Warrens does not have a valid Firearm Owners Identification card.

Officers searched Warrens’ home and located dozens of firearms, including high-powered rifles, shotguns, AK-47s and pistols.

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Hundreds of rounds of ammunition were also seized.

Warrens was transported to an area hospital for the dog bite where he was treated and released back into the custody of the sheriff’s office.

“Based on the placement of the firearms throughout the home, it was clear to sheriff’s deputies that Warrens was anticipating law-enforcement’s involvement and prepared to have a deadly shootout,” Covelli said.

Lewis said during Warrens’ initial bond hearing that prosecutors were “extremely concerned” about the man, who told the court he is from Michigan but had been living with a relative in Lake County recently.

Lake County Judge Veronica O’Malley said the charges are “extremely serious” and there is a “real and present” threat.

O’Malley ordered Warrens held on a $750,000 bond and ordered him to have no contact with the main victim.

A bond review hearing was later held and Assistant Public Defender Reed Nixon said Warrens’ bond of $750,000 was “astronomical” as he asked for a lower bond.

Nixon noted that Warrens has a limited criminal history and is grieving the death of his mother. Nixon also said his client is a “firearms enthusiast.”

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Lake County Judge Theodore Potkonjak denied Nixon’s request for the bond reduction.

Jail records show Warrens was released Thursday from the Lake County Jail — nearly two months after his arrest.

He posted 10% of his $750,000 bond, or $75,000, and was released from custody.

Court records show prosecutors on December 16 filed a petition to detain Warrens, which had not been granted by a judge yet because the SAFE-T Act’s bail provisions do not go into effect until January 1.

Lake County Sheriff John Idleburg said in a previous statement that there is “no doubt this man is violent and intended to cause harm or death to others.”

“This is a situation that could have undoubtedly ended in innocent lives lost and I am incredibly proud of our staff for putting their lives on the line to apprehend this dangerous man,” Idleburg said.

“This situation emphasizes the importance of saying something to law-enforcement when you see or hear something concerning or suspicious,” Idleburg added.

Warrens is scheduled to appear in court again on January 31 for a case management conference.