just over something stupid, you know, and little. >> reporter: detective salm pressed paul about his past. >> you've got several incidents here -- >> i have a criminal record. >> you've been involved in some bad stuff. okay? you cut phone wires. >> i tried to help you guys out through this whole thing. you're going to start to cop an attitude -- >> i'm not trying to cop an attitude with you, but i'm having trouble with some of the stuff you're saying. >> i know my word doesn't [ bleep ], i'm a felon, a drug addict. everybody knows about it. i put up with a lot of [ bleep ] here -- >> so this must have put a whole different complexion on paul. >> it did. >> reporter: having thought for some time that maybe peter was your guy. what was that like? >> it's possible we may have somebody else to look at. >> reporter: and indeed they did. attached gps trackers to both peter and paul's vehicles, which produced precisely nothing. more weeks slipped by. eduardo ayala, aware he and his family could be the killer's next targets, lay awake at night thinking. >> i would imagine peter trying to bui

detective salm and the others went home for the weekend to digest what they had read and seen.ang, 7:00 a.m. >> hey, we got another one of those letters. i came to work. there was a second letter sitting on my desk. this one was slightly smaller manila envelope or half size. but configured the same way. label maker, address, aayala case, and way too much postage again. >> reporter: huh. what was inside that one? >> it was a diagram of a bomb. >>> coming up, invitation from a killer. >> the letter said if you have any questions, place an ad in the "sacramento bee" and make sure it's the last ad. >> and another victim in the cross hairs? >> keeping that stuff confidential was important to integrity. >> a man's life might be in jeopardy. >> we gave him as strong a warning as we could. >> when "dateline" continues. you'll ask... what pain? advil liqui-gels minis. how do we make a scented oil plug-in that doesn't smell fake? start with the essence of nature air wick scented oils are infused... ...with essential oils that are 100% natural. to fill every corner with the fragrance of n

aoc, the congresswoman from new york, tweeted a sarcastic salm, that she was glad to see the oil industrydown. until leaders on both sides of the aisle say without strength and energy, every single one of our industries suffers, then it is hard to get a deal done. it is time for the people that were anti-oil and gas, because it was politically convenient for so long to get off of that train. if america is starving for energy and prices are double what they are today, everyone one of them should be voted out of office. then we have to look at deals to support this vital piece of the american economy. annmarie: i think the congresswoman actually deleted that tweet. they were asking about the future of energy demand. how much do you see them and lost? where are we on storage? goldman says cushing will be filled by may. ryan: i will speak to the supply. we run some models in my office. we have 30 million barrels a day that the world is oversupplied right now. that is before the opec cuts come into effect the next few weeks. storage is up around the world. i agree with that number. the first o

jbs, american foods groom and salm partners. jbs closing throughout this. but another aspect is when you look at the demographics of employees infected here, 35% hispanic, 20% black but the 35% hispanic is the highest among minorities groups that we've seen in places across this country. i spoke to one worker here in green bay who worked at gren one of the meat processing plants that has been affected and he said by his estimation 90% of the people he works with are hispanic. and that spanish is definitely the first language spoken at their plant and they say that they are nervous about potentially coming to work, scared in some cases. and while the person i spoke to wasn't undocumented himself, he said he knows many undocumented workers that are fearful of even speaking to management for fear they won't be asked to return, kate. >> and that adds to all of the anxiety and what this means if they're being told they need to go back. omar, thank you. >>> joining me now for more is david michaels, the longest head of osha, the federal agency tasked with worker