Justice James Wakiaga while denying Irungu bail also said he is a flight risk who is likely to abscond the jurisdiction of the court.
Irungu is charged alongside Citizen TV journalist Jacque Maribe for the murder of businesswoman Monicah Kimani at her apartment in Kilimani.
Maribe has been released on a Sh1 million cash bail and an alternative of a Sh2 million bond or three sureties of a similar amount.
Justice Wakiaga explained that lack of permanent residence for Irungu and lack of occupation also played a role in the decision to deny him bail.
"He was living in the house of the second accused, driving the second accused's car with no known source of income since 2017 when he provided security for some Jubilee politicians," Judge Wakiaga added.
Also, his well documented love for guns and the fact that he can have access to one was highlighted.
The court said Jowie, being a person with specialised security training, and having handled various guns, he would pause a risk by creating fear and intimidating witnesses.
He said Jowie had also self inflicted wound while attempting to commit suicide and that was an indication that his life is in danger and needed protective custody under proper police supervision.
"This court therefore orders that the first accused person remains in custody for the period of his trial and must be accorded proper treatment," Justice Wakiaga said.