The shoe drive was originally an initiative by Griner to help those in need in the Phoenix metropolitan area
"I realize you are dealing with so much, but please don't forget about me and the other American Detainees," Griner said in her letter Monday
The U.S. government “is actively engaged in trying to resolve this case and get Brittney home,” the White House said
Detained WNBA star's trial to begin on July 1
WNBA star detained in Moscow airport in February
HRC, GLAAD among letter signatories
Calls to embassy phone in Moscow went unanswered on Saturday
State Department officials on Monday met with WNBA star's teammates
Consular visit took place on May 19
Out WNBA star detained in Moscow in February.