PORTLAND, Ore. (KOIN) — A Portland woman who admitted 3 weeks ago she cheated in marathons is already suspected of doing it again.

Emily Clark took 2nd place in the Appletree Half Marathon in Vancouver in September, but organizers later determined she cheated by riding a bike.

Now, the Chicago Marathon is questioning how she ran 6-minute miles near the end of Sunday’s race. Her results were marked “PND” — which means “due to what could be any number of factors, a runner’s record can not be ratified. Factors could include missing finish times, missing splits or other scoring issues. If event organizers can not validate the information provided by a runner, the results of that runner will be disqualified.”

Wednesday, Clark spoke off-camera with KOIN 6 News. She said she “had 2 asthma attacks (during the race). I have 2 friends who can attest to that.”

But when asked how she accounted for the very fast 6-minute miles, she said, “When you deal with it, then…” and told reporter Dan Tilkin to leave.

In an email a month ago, she admitted cheating in 5 other races, including a prior Chicago Marathon.