Lance Twiggs, the transgender live-in partner of Tyler Robinson, the suspect accused of murdering conservative political activist Charlie Kirk, has reportedly gone missing, the New York Post reports.

Twiggs, 22, who was previously reported to have fled their shared Utah townhouse after Robinson was identified and arrested, was reported to have vanished from St. George, Utah, entirely. Twiggs had previously cooperated with authorities, but refused to speak to media ahead of Robinson's trial.

Twiggs -- whom authorities have referred to using masculine pronouns -- moved in with Robinson after being kicked out of his Mormon parents' home in 2018, though there is speculation that they have since reconciled as his Venmo account shows several payments from his parents over the last two years, which included the descriptions of "prescriptions" and "gas money," the last of which was made months before Kirk's death.

Twiggs' car is reportedly parked in his parents' driveway, however, it's unclear if he has moved back in with them. Last month, Twiggs was reported to have disappeared from the St. George townhouse he shared with Robinson, with mail reported to be piling up and a continued police presence in the community weeks after Robinson's arrest.

“It definitely is a shock it happened here. It’s a quiet neighborhood. You know your neighbor on your left or your right, but people are pretty isolated,” said Jesse Riley, who lives a few houses down. “I haven’t seen anyone come out. There are still all these notes on the door, so it looks like nobody has been in there.”

Washington County Sheriff Nate Brooksby had previously confirmed that Twiggs, who wasn't charged in connection with Kirk's shooting, was in a "safe space very far away from St. George" and needed "to lay low for a long time" amid public backlash. A federal investigation into Robinson reportedly revealed that he has no link to left-wing groups, three sources with knowledge of the situation confirmed to NBC News.

“Thus far, there is no evidence connecting the suspect with any left-wing groups," one source said. “Every indication so far is that this was one guy who did one really bad thing because he found Kirk’s ideology personally offensive."