( CNN ) -- Four men and three women have been arrested in connection with shootings that left two Louisiana sheriff 's deputies dead and two others wounded , police said Friday . Their arrests , and the preliminary charges they are facing , follow a pair of allegedly linked shootings early Thursday in LaPlace , a community of about 30,000 people located roughly 25 miles west of New Orleans . Five of those arrested are now in jail , while the two others remain hospitalized for treatment of gunshot wounds , Louisiana State Police spokesman Melissa Matey said Friday . St. John the Baptist Parish Sheriff Michael Tregre called the slain and wounded deputies `` heroes '' and described those arrested as `` some very violent individuals . '' `` The people that ( the deputies ) lost their lives for , that we have in custody , I believe are some of the most violent , evil people on the planet , '' Tregre said Friday . All the charges levied against the suspects , thus far , apply to the first shooting that occurred around 5 a.m. in a parking lot near the Bayou Steel plant in LaPlace , according to police . A man there shot Deputy Michael Boyington from the St. John the Baptist Parish Sheriff 's Office -- who was directing traffic at the time -- several times , Tregre said Thursday . Despite his injuries , Boyington told dispatchers about the suspect . His description , along with a civilian report of a speeding car , led responding officers to a nearby trailer park , the sheriff said . Col. Michael Edmonson , superintendent of the Louisiana State Police , said Friday that investigators have determined that five of those under arrest were in the car that sped from the scene . Boyington is at University Hospital in New Orleans , where Tregre said he had visited him and found him to be `` very good , upbeat , very positive , very strong . '' A law enforcement source who was not authorized to speak on the record said Thursday that the deputy had been shot in the shoulder and is expected to survive . `` He just wanted me to tell everyone that he 'll be back to work Monday , '' Tregre said Friday . Brian Lyn Smith , 24 , will be charged with attempted first-degree murder of a police officer tied to Boyington 's shooting , police said . Four others -- 44-year-old Terry Smith , 22-year-old Derrick Smith , 28-year-old Kyle David Joekel and 21-year-old Teniecha Bright -- each face charges of being a principal to attempted first-degree murder of a police officer . Chanel Skains , 37 , and Brittney Keith , 23 , have been charged with being an accessory after the fact to attempted first-degree murder of a police officer , authorities said . Brian Smith and Joekel will be formally charged after their release from the hospital , according to information released Friday by the parish sheriff 's office . `` Once ... the hospital says , they 're OK and they can leave the hospital , believe me , they 're going straight to jail , '' Edmonson said of the two hospitalized suspects . All those facing charges lived in one of three nearby addresses on the same street in LaPlace . And they could face additional charges tied to the second shooting later Thursday at a trailer park in that same city . In that incident , deputies who had gone there to investigate the initial shooting were questioning two people when a man ambushed them , Tregre said . Multiple weapons were used and at least 20 shots were fired in this shooting , according to Edmonson . St. John the Baptist Sheriff 's Deputies Brandon Nielsen , 34 , and Jeremy Triche , 28 , were killed in the gunfire . Nielsen was married with five children and Triche had a wife and a 2-year-old son , Tregre told reporters . Deputy Jason Triche -- who is not related to Jeremy Triche -- was wounded in that shooting , according to Louisiana State Trooper Evan Harrell . Jason Triche is `` recovering very , very well '' at LaPlace 's River Parishes Hospital , where Tregre visited him and said he believes that he was taken off a ventilator Friday and `` could n't really speak , but he could write . '' As to the overall investigation , the state police superintendent stressed Friday that `` there are a lot of things that we do n't know and that we will find out , '' vowing that authorities will `` very tediously , very delicately '' compile evidence and interview witnesses . `` We 'll build our case on what we know now , ( including about ) the individuals in the car . And now we are going to work our way back to the scene where those two deputies were killed , '' Edmonson said . `` It 's going to take us a while to do that . '' The slain and wounded sheriff 's deputies will be honored Friday at a candlelight vigil , which starts at 8 p.m. ( 9 p.m . ET ) in front of the Percy Hebert Building in LaPlace , Tregre said . In addition , the Mercedes-Benz Superdome in New Orleans will be lit in blue Friday night and there will be a moment of silence to remember Nielsen and Jeremy Triche before the New Orleans Saints take on the Jacksonville Jaguars in an NFL pre-season game , according to the sheriff . CNN 's Rick Martin contributed to this report .
NEW : The suspects are `` some of the most violent , evil people on the planet , '' sheriff says . NEW : 5 of those arrested were in a car that sped from the first shooting , state police say . A Louisiana sheriff 's deputy directing traffic was shot and wounded , police have said . A short time later , 2 responding deputies die and another is hurt in a nearby shooting .