- That his hands were shaking and he avoided eye contact during a traffic stop;
- He refused to consent to a search of his person;
- He stood erect with his legs together;
- No drugs were found in his car or in a pat-down of him (police pat-downs for weapons often turn up drugs, which mysteriously feel like dangerous weapons when touched by police, or which are immediately identifiable as drugs when touched by police);
- A drug dog (with no information given about the dog's training or qualifications or success rate) "alerted" to his car seat (though no drugs were found in his car); and
- An unidentified Hidalgo County K-9 officer asserted, without any specificity, that Eckert had previously hidden drugs in his anus.
That's all. It really comes down to three things: (1) subjective officer impressions that Eckert looked nervous, (2) a dog alerting on his seat, and (3) an unnamed cop making an unspecific claim that he had previously hidden drugs in his anus.