A DNA expert is accused of playing fast and loose with the truth. SoCal killers could now go free.

Some of Southern California’s most notorious murder convictions may hang in the balance amid accusations of misconduct by a 30-year veteran of the Orange County Crime Lab.

DNA expert Mary Hong has been accused of altering her testimony to help defendants get convicted. One homicide defendant has already been released after Hong said she could no longer stand by testimony she made six years prior.

But the fallout isn’t likely to stop there. The Orange County District Attorney’s Office is now reviewing other cases Hong has worked on. It’s not clear how many will be reviewed, but Hong’s work spanned years and involved some notorious Southland killers.

Hong left the crime lab in 2016 and now works for the California Department of Justice.

Read more about the possible implications at The Mercury News.