Prosecutors will not charge a Macomb County lawmaker after an investigation into allegations from a fellow lawmaker who said he sent her threatening text messages following their breakup.

The head of Ingham County’s sexual assault/domestic violence unit reviewed an investigative report into Harrison Township Republican Rep. Steve Marino submitted by Michigan State Police to Prosecutor Carol Siemon’s office in late September.

Sarah Pulda, lead prosecutor of the Sexual Assault & Domestic Violence and Crimes Against Children division, confirmed Tuesday she determined charges were not warranted.

“We are unable to prove the case beyond a reasonable doubt,” Pulda told the Detroit Free Press.

After their romantic relationship dissolved, Marino had vowed to destroy state Rep. Mari Manoogian’s life, berating her with obscenities and suggesting he hoped her car exploded on her way to work, according to text messages and other records recently filed in court.

“I’m making it my life mission to destroy you,” Marino said to Manoogian in an undated text message, according to Ingham County court records.

Marino has described broader allegations of abuse against Manoogian as “insinuations made (that) are nothing more than politically motivated character assassination that I am confident will conclude as a waste of the public’s time.”

Marino has had a rather bizarre path to winning election as a Macomb County commissioner at age 25 and then twice as a state representative.