What's a possible sign that an L.A. Times writer might have a certain former president and current presidential candidate living in their head rent-free? 

When you've "accidentally" used the name Trump instead of the name of the person you're writing the obituary for: 

The section of the obituary in question was about Simpson's prison term, which was where the name Trump was used instead:

The Los Angeles Times used the former president's name in a prewritten obituary, which media outlets typically have at the ready for celebrities, political figures and other noteworthy individuals, instead of using Simpson's name in a published version that was quickly corrected.

"Long before the city woke up on a fall morning in 2017, Trump walked out of Lovelock Correctional Center outside Reno, a free man for the first time in nine years," the obituary initially read upon publication. "He didn’t go far, moving into a 5,000-square-foot home in Las Vegas with a Bentley in the driveway."

Perhaps somebody was trying to get a laugh around the newsroom but forgot to fix it before publication. 

Who would "accidentally" write Trump instead of Simpson? 

Another banner day for "journalism."

Will the L.A. Times also mention Trump in the obituary for their own newspaper? Maybe someday before too long we'll find out.