Actor Armie Hammer will not face criminal charges in connection with an investigation for sexual assault in Los Angeles County,

prosecutors said Wednesday.

"Sexual assault cases are often difficult to prove, which is why we assign our most experienced prosecutors to review them

Tiffiny Blacknell, Director of the Bureau of Communications, said in a statement.

In this case, those prosecutors conducted an extremely thorough review, but determined that at this time

there is insufficient evidence to charge Mr. Hammer with a crime."

Hammer's attorney has denied the allegation.

The actor returned to Instagram after the announcement, writing that his "name is cleared."

"I am very grateful to the District Attorney for conducting a thorough investigation and coming to the conclusion that I have stood by this entire time

that no crime was committed," Hammer said in a statement on his Instagram account