NEW: Armed man detained at Charlie Kirk memorial site after claiming to be law enforcement

According to Fox News, "The U.S. Secret Service (USSS) in coordination with local law enforcement in Glendale, Arizona, is investigating an individual who was observed exhibiting suspicious behavior at State Farm Stadium," USSS spokesman Anthony Guglielmi said. The man who was arrested was identified as Joshua Runkles, and was charged with impersonating a law enforcement officer.

"The individual was approached by Secret Service and stated during the encounter that he was a member of law enforcement and that he was armed. The individual is not a member of authorized law enforcement working the event and is currently in custody," Guglielmi added. "The U.S. Secret Service and local law enforcement are investigating the circumstances as to why he was at the location."

However, TPUSA spokesman Andrew Kolvet said in a post on X, "I want to add a note of clarity here. This individual was doing advance security for a known guest planning to attend the memorial service tomorrow. We do not believe this person was attempting anything nefarious, however the advance was not done in proper coordination with the TPUSA security team or US Secret Service. Also important to note that this was before the site had been fully sealed and locked down. Every precaution is being taken to ensure everyone’s safety."

A federal source familiar with the investigation told Fox News, "This guy is a former deputy sheriff out of Idaho. He came and identified himself with expired credentials. They are going through his background and trying to figure out what he was up to there."

President Donald Trump as well as Vice President JD Vance and many others are expected to attend the event, which is expected to draw 100,000 people.

Kirk was assassinated on September 10, and 22-year-old Tyler Robinson has been charged with murder in the crime. Robinson was initially able to evade police. However, after authorities released photos and video of the suspect his father was able to identify him and helped turn in his son. Robinson was taken into custody on the night of September 11 and has been charged with aggravated murder in the assassination of Kirk among several other charges.