arrested: past participle, past tense of ar·rest (Verb)
Verb
Seize (someone) by legal authority and take into custody.
Detaining someone for a certain amount of time is not the the definition for arrest. Police putting you in handcuffs and then into a police car with no choice is.
There were only ever two people in this scenario Adam Lanza and the guy in the woods so the guy in the video has to be the off duty SWAT member according to the information available. Unless there is a third character which is even more suspicious.
More evidence "A man with a gun who was spotted in the woods near the school on the day of the incident was an off-duty tactical squad police officer from another town, according to the source." -
http://newtownbee.com/news/news/2012/12/27/police-union-seeks-funding-trauma-treatment/4576
The off duty tactical officer was was on film and had a gun and was arrested, the proof is above.
Again : WHY WAS THERE AN OFF DUTY SWAT MEMBER IN A NON PUBLIC WOODS, CARRYING A WEAPON, ARRESTED SHORTLY AFTER THE SANDY HOOK SHOOTING WEARING EXACTLY THE SAME THINGS AS THE SHOOTER/SHOOTERS?