TMZSports.com
Law enforcement clearly took Brittney Griner's "Gay Baby Jail" note concerns seriously ... new police video, obtained by TMZ Sports, shows two cops intently investigating the matter.
The bizarre scene unfolded back on Feb. 17 at the Gaylord National Resort & Convention Center in Maryland ... after Griner told officials at the hotel she had discovered a handwritten message in her room that she found to be threatening.
Prince George's County Police body camera footage shows just a couple hours after the WNBA superstar hastily bolted from the area over the letter .