In Monroe's defense, he had no way of knowing that the police had been filled in on his involvement.
And if he was officially helping out, then Monroe being in the cage and fighting would not be unusual (nor would he be charged with any wrong doing since he wasn't trying to kill anyone) since he could legitimately say what happened - he was helping out with a lead, got caught, and forced to fight. he found a guy that was doing bets.") so it's not like Monroe's involvement was a mystery or unofficial. But a few scenes before, Nick explicitly told Hank that Monroe had/was following a lead for them (". Why does Monroe split at the end when the cops come? At first, yes, it's so he's not caught where he's not suppose to be as with other episodes. People might question it, sure, but no one is going to look at her, go "Huh, what a strange happenstance," and conclude "She must be a spider-person!" It doesn't really need to be covered up. Nick might get suspicious but Renard might gamble on the general lack of knowledge Nick has as well as the general obscurity of Spinnetods. IE he retires her to a Wesen home where she lives her days in anonymity. only she has a heart attack on the way there and dies.
Perhaps Renard acknowledges the unusual condition and has her sent to a hospital for caretaking.
After the end of "Tarentella", how is anyone not in on The Masquerade going to explain how the arrested Spinnetod aged into an old woman overnight, or that she has a regenerated finger with an exact print match to the severed one found at the scene of the first murder? Even if Captain Renard takes steps to cover it up, how would he do so without attracting suspicion from Nick?.
While thrashing about, the iPod may have accidentally had a button hit that put put the song on repeat. Like the breaking the watch reason, the watch ends up breaking due to a major impact.
It's also possible that it was accidentally put on repeat when she was killed.
Or the producers just didn't want to pay for the rights to additional songs.
Basically he confirmed his guilt by jumping the gun. At which point the subject turned all his lights off and tried to make a runner.
It wasn't, realising it was the same song merely was enough for them to turn around and go back to double check.
Not to mention the fact that the guy is old enough to have heard the song when it was released. I work at a thrift store and that song has played over our PA system before).
A better question about the Pilot is why they later concluded that their suspect humming this well-known song is proof that he must be their killer? Granted, they're right, he's guilty, but what reasonable person would assume that he could only have heard that song from her iPod, as opposed to any number of other places (a coffee shop, for example, or a store.
Maybe the runner wanted to do something similar, maybe she was timing her run to the song.
Weird as it is, this troper will actually put a song on repeat as a musical timer, like if I know something I'm doing should take about the run legnth of a song, then I'll set that song and when I hear it repeat then I know I've gone over time.
Furthermore, the song was stuck in the killer's head because it was repeating over and over again as he ate her.
Is it really that improbable that someone would listen to the same song over and over again? Fridge Brilliance: She just really likes The Eurythmics, and Hank saw that the iPod was on repeat when they found the body so they know that the song was playing when she was killed.