Updated

A secret government energy lab in Colorado went on heightened alert after one of its employees used Twitter to threaten mass murder against Watchdog reporters, according to internal memos and emails received under the Freedom of Information Act.

But the added security measures utilized by the National Renewable Energy Lab weren’t to isolate and chastise staffer Kerrilee Crosby, who used Twitter in late 2012 to advocate what she called “a murderous rampage.”

Instead, the lab was concerned because an unidentified individual sent Crosby an email labeled “Because you deserve to die” — the same words Crosby used in her threat against Watchdog.

Crosby, then 34, hit Twitter after a Watchdog.org report exposed the million-dollar salary of NREL’s top executive.

“Have you ever felt like going on a murderous rampage? Start at @WatchdogCO’s offices,” Crosby tweeted while on the job at NREL. “They perpetuate lies like this.”

She went on to call Watchdog.org “f***ing retarded” and the “Fox News of blogs” before saying she made the death threat “because you deserve to die.”

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