According to the report, the Cartagena hotel where they were staying, El Caribe, allowed guests to entertain overnight guests - "commonly a prostitute" - and that no Colombian laws appeared to have been broken.
But investigators did receive complaints from local witnesses about the general behavior of the US personnel, including that the dozen suspects had kept "overnight guests" in their rooms after 6am in breach of hotel rules.
"Explosive detection dog handlers were allowing their animals to sleep in hotel beds, soil the linens and urinate and defecate in inappropriate locations on the hotel grounds, leaving the waste," the report added.
"Unidentified hotel guests, thought to be American, were bothering and propositioning college-age female greeters working at El Caribe with the Colombian Ministry of Foreign Affairs," it noted.
April's scandal was embarrassing to the Obama administration and led to allegations that the servicemen and agents might have compromised national security or the President's safety by consorting with Colombian women.
The report, however, concluded there was no evidence that the women had ties to criminal drug-smuggling groups or terrorist movements, nor were they victims of human trafficking networks.
