I complied the full code for my trigger. It runs fine the first time I add a Con_Service_Task Record and when I attempt to run again it does not insert my Con_Service_Task Record and sends me an email with the following error. 

Apex script unhandled trigger exception by user/organization: 005A0000001VzT0/00DT0000000Jq5H Source organization: 00DA0000000Abte (null)

ConVerificationRecordSetup: execution of AfterInsert

caused by: System.DmlException: Insert failed. First exception on row 0; first error: CANNOT_INSERT_UPDATE_ACTIVATE_ENTITY, ConVerificationRecordSetup: maximum trigger depth exceeded Con_Service_Task_Request trigger event AfterInsert for [a0TT0000002jmOW]

Here is my full code, not sure where to do next to get this running, and would appreciate any  gudiance.

trigger ConVerificationRecordSetup on Con_Service_Task_Request__c (after insert, after update) 
{
Set<ID> accID = new Set<ID>();
//map to contain Con_Service_Task_Request__c record's id as key and it's master Account record's ID as value
Map<ID, ID> mapST_Account = new Map<ID, ID>();
for(Con_Service_Task_Request__c ST : trigger.new){
         //This "Con_Service_Task_Request__c" should be API Name of Master Detail relationship with the Account 
         accID.add(ST.Account__c);
         mapST_Account.put(ST.id , ST.Account__c);
    }
Map<Id,List<Account>> records = new Map<Id,List<Account>>();
for(Account a : [SELECT id , 
(select id from Bankruptcy_Judgements_Liens_Report__r), 
(select id from Business_Filings_Verifications__r), 
(select id from Identity_Verifications__r), 
(select id from Criminal_Sex_Offender_Reports__r),
(select id from License_Verifications__r), 
(select id from General_Liability_Insurance_Verification__r), 
(select id from Eco_Friendly_Accreditation_Verifications__r), 
(select id from Trade_Reference_Reports__r),
(select id from Customer_Reference_Reports__r)
FROM Account 
WHERE id in : accID]) {
    if(!records.containsKey(a.id))  {
        records.put(a.id , new List<Account>());
    }
    records.get(a.id).add(a);
    
}   

for (Con_Service_Task_Request__c ST : Trigger.new) {

Contact Principalcontact=[SELECT ID FROM Contact WHERE AccountId = : ST.Account__c AND Contact_Type__c = 'Acct Principal Contact' limit 1];

//INSERT NEW BJLV RECORD IF REQUIRED AND DOES NOT YET EXSIST 
if (records.get(mapST_Account.get(ST.id)).get(0).Bankruptcy_Judgements_Liens_Report__r.Size()  == 0) 
{ 
 Contact BJLVAgencyContact = new Contact(AccountId = ST.Account__c , Contact_Type__c = 'BJLV Agency', LastName = 'Enter Last Name');
 insert BJLVAgencyContact;
 
 Bankruptcy_Judgements_Liens_Report__c BJLV = new Bankruptcy_Judgements_Liens_Report__c(Account__c = ST.Account__c , BJLV_Agency_Contact__c = BJLVAgencyContact.ID );    
 insert BJLV;      
}


//INSERT NEW BFV RECORD IF REQUIRED AND DOES NOT YET EXSIST 
if (records.get(mapST_Account.get(ST.id)).get(0).Business_Filings_Verifications__r.Size()  == 0)  
{ 
 Contact BFVAgencyContact = new Contact(AccountId = ST.Account__c , Contact_Type__c = 'BFV Agency', LastName = 'Enter Last Name');
 insert BFVAgencyContact;
 
 Business_Filings_Verification__c BFV = new Business_Filings_Verification__c(Account__c = ST.Account__c , BFV_Agency_Contact__c = BFVAgencyContact.ID );    
 insert BFV;      
}

//INSERT NEW IDV RECORD IF REQUIRED AND DOES NOT YET EXSIST 
if (records.get(mapST_Account.get(ST.id)).get(0).Identity_Verifications__r.Size()  == 0)  
{ 
 Contact IDVAgencyContact = new Contact(AccountId = ST.Account__c , Contact_Type__c = 'IDV Agency', LastName = 'Enter Last Name');
 insert IDVAgencyContact;
 
 Identity_Verification__c IDV = new Identity_Verification__c(Account__c = ST.Account__c , IDV_Agency_Contact__c = IDVAgencyContact.ID );    
 insert IDV;      
}


//INSERT NEW CSOV RECORD IF REQUIRED AND DOES NOT YET EXSIST 
if (records.get(mapST_Account.get(ST.id)).get(0).Criminal_Sex_Offender_Reports__r.Size()  == 0)  
{ 
 Contact CSOVAgencyContact = new Contact(AccountId = ST.Account__c , Contact_Type__c = 'CSOV Agency', LastName = 'Enter Last Name');
 insert CSOVAgencyContact;
 
 Criminal_Sex_Offender_Report__c CSOV = new Criminal_Sex_Offender_Report__c(Account__c = ST.Account__c , CSOV_Agency_Contact__c = CSOVAgencyContact.ID );    
 insert CSOV;      
}


//INSERT NEW LV RECORD IF REQUIRED AND DOES NOT YET EXSIST 
if (records.get(mapST_Account.get(ST.id)).get(0).License_Verifications__r.Size()  == 0)  
{ 
 Contact LVAgencyContact = new Contact(AccountId = ST.Account__c , Contact_Type__c = 'LV Agency', LastName = 'Enter Last Name');
 insert LVAgencyContact;
 
 License_Verification__c LV = new License_Verification__c(Account__c = ST.Account__c , LV_Agency_Contact__c = LVAgencyContact.ID );    
 insert LV;      
}

//INSERT NEW GLIV RECORD IF REQUIRED AND DOES NOT YET EXSIST 
if (records.get(mapST_Account.get(ST.id)).get(0).General_Liability_Insurance_Verification__r.Size()  == 0) 
{ 
 Contact GLIVAgencyContact = new Contact(AccountId = ST.Account__c , Contact_Type__c = 'GLIV Agency', LastName = 'Enter Last Name');
 insert GLIVAgencyContact;
 
 General_Liability_Insurance_Verification__c GLIV = new General_Liability_Insurance_Verification__c(Account__c = ST.Account__c , GLIV_Agent_Contact__c = GLIVAgencyContact.ID );    
 insert GLIV;      
}

//INSERT NEW EFAV RECORD IF REQUIRED AND DOES NOT YET EXSIST 
if (records.get(mapST_Account.get(ST.id)).get(0).Eco_Friendly_Accreditation_Verifications__r.Size()  == 0) 
{ 
 Contact EFAVAgencyContact = new Contact(AccountId = ST.Account__c , Contact_Type__c = 'EFAV Agency', LastName = 'Enter Last Name');
 insert EFAVAgencyContact;
 
 Eco_Friendly_Accreditation_Verification__c EFAV = new Eco_Friendly_Accreditation_Verification__c(Account__c = ST.Account__c , EFAV_Agency_Contact__c = EFAVAgencyContact.ID );    
 insert EFAV;      
}

//INSERT 3 NEW CRV RECORDS IF REQUIRED
if (!ST.Service__r.Customer_Reference_Reports__c)
{
 
 Contact CRVContact1 = new Contact(AccountId = ST.Account__c , Contact_Type__c = 'CRV Contact', LastName = 'Enter Last Name');
 insert CRVContact1;
 
 Customer_Reference_Report__c CRV1 = new Customer_Reference_Report__c(CRV_Service__c = ST.ID, CRV_Account__c = ST.Account__c , CRV_Contact__c = CRVContact1.ID, CRV_Principal_Contact__c = PrincipalContact.ID );    
 insert CRV1;      

 Contact CRVContact2 = new Contact(AccountId = ST.Account__c , Contact_Type__c = 'CRV Contact', LastName = 'Enter Last Name');
 insert CRVContact2;
 
 Customer_Reference_Report__c CRV2 = new Customer_Reference_Report__c(CRV_Service__c = ST.ID, CRV_Account__c = ST.Account__c , CRV_Contact__c = CRVContact2.ID, CRV_Principal_Contact__c = PrincipalContact.ID );    
 insert CRV2;  
 
  Contact CRVContact3 = new Contact(AccountId = ST.Account__c , Contact_Type__c = 'CRV Contact', LastName = 'Enter Last Name');
 insert CRVContact3;
 
 Customer_Reference_Report__c CRV3 = new Customer_Reference_Report__c(CRV_Service__c = ST.ID, CRV_Account__c = ST.Account__c , CRV_Contact__c = CRVContact3.ID, CRV_Principal_Contact__c = PrincipalContact.ID );    
 insert CRV3;  

}


//CHECK TO SEE IF TRADE REFERENCE FOR PARTICULAR CATEGORY EXISITS, IF SO ASSIGN ID'S TO ST, //IF NOT CREATE 3 NEW TRV RECORDS

Trade_Reference_Report__c[] ExistingTRVs = [SELECT ID FROM Trade_Reference_Report__c WHERE Account__c = : ST.Account__c AND TRV_Work_Category__c = : ST.Category__c limit 3]; 

if (ExistingTRVs.Size()  == 3)
{
ST.Trade_Reference_Report_1__c = ExistingTRVs[0].ID;
ST.Trade_Reference_Report_2__c = ExistingTRVs[1].ID;
ST.Trade_Reference_Report_3__c = ExistingTRVs[2].ID;
}

if (ExistingTRVs.Size()  == 0)
{ 
 Contact TRVCompanyContact1 = new Contact(AccountId = ST.Account__c , Contact_Type__c = 'TRV Company', LastName = 'Enter Last Name');
 insert TRVCompanyContact1;
 
 Trade_Reference_Report__c TRV1 = new Trade_Reference_Report__c(Account__c = ST.Account__c , TRV_Company_Contact__c = TRVCompanyContact1.ID, TRV_Principal_Contact__c = PrincipalContact.ID );    
 insert TRV1;
 
 ST.Trade_Reference_Report_1__c = TRV1.ID;
 
 
 Contact TRVCompanyContact2 = new Contact(AccountId = ST.Account__c , Contact_Type__c = 'TRV Company', LastName = 'Enter Last Name');
 insert TRVCompanyContact2;
 
 Trade_Reference_Report__c TRV2 = new Trade_Reference_Report__c(Account__c = ST.Account__c , TRV_Company_Contact__c = TRVCompanyContact2.ID, TRV_Principal_Contact__c = PrincipalContact.ID );    
 insert TRV2; 
 
 ST.Trade_Reference_Report_2__c = TRV2.ID;
 
 
 Contact TRVCompanyContact3 = new Contact(AccountId = ST.Account__c , Contact_Type__c = 'TRV Company', LastName = 'Enter Last Name');
 insert TRVCompanyContact3;
 
 Trade_Reference_Report__c TRV3 = new Trade_Reference_Report__c(Account__c = ST.Account__c , TRV_Company_Contact__c = TRVCompanyContact3.ID, TRV_Principal_Contact__c = PrincipalContact.ID );    
 insert TRV3; 
 
 ST.Trade_Reference_Report_3__c = TRV3.ID;
       
}



}

}